A flue gas denitration device for waste incineration

Abstract

The present application relates to waste gas treatment technical field, especially to a kind of waste gas denitration device for garbage incineration.The technical problem is that the existing denitration treatment device injection angle is fixed, and the distribution of denitration solution in waste gas passage is uneven, which leads to low denitration quality.A kind of waste gas denitration device for garbage incineration, including incinerator, incinerator is equipped with flue gas duct, flue gas duct is equipped with branch flue, flue gas duct is equipped with liquid delivery pipe and shunt pipe, shunt pipe and liquid delivery pipe are connected with ball valve between, ball valve is equipped with valve core.Transmission gear rotation will drive gear ring rotation, gear ring rotation will drive driving gear rotation, driving gear rotation will drive rotating rod rotation, rotating rod rotation will drive spray pipe rotation through hexapod, so that spray pipe can rotate and spray denitration solution, in this way, the denitration solution in branch flue chamber can be more evenly distributed, so as to improve waste gas denitration quality.

Description

A flue gas denitrification device for waste incineration Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and in particular to a flue gas denitrification device for waste incineration. Background Technology

[0002] Waste incineration is a crucial method for modern urban waste management, effectively reducing waste volume and recovering energy. However, the incineration process generates large amounts of waste gas containing various harmful gases, such as nitrogen oxides (NOx) and dioxins. Therefore, the purification and treatment of this waste gas are of paramount importance. Current incineration plants typically employ denitrification technology to reduce NOx in the waste gas. Common denitrification technologies include selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR). SNCR is a common denitrification method; its basic principle involves injecting a reducing agent (such as ammonia or urea solution) into the high-temperature waste gas, converting nitrogen oxides into harmless nitrogen and water vapor through a chemical reaction.

[0003] However, in the existing incineration plants, the denitrification solution is sprayed into the waste gas channel by a spraying device during the nitrification process. However, due to the high flow rate of the waste gas and the fixed spray angle, the distribution of the denitrification solution in the waste gas channel is uneven, which leads to unstable denitrification effect. Some nitrogen oxides in the waste gas are not completely converted, resulting in low denitrification quality. Summary of the Invention

[0004] To overcome the shortcomings of existing denitrification devices, such as fixed spray angles and uneven distribution of denitrification solution in the exhaust gas channel, resulting in low denitrification quality, the technical problem is to provide a flue gas denitrification device for waste incineration that can separate exhaust gas and spray denitrification solution in a rotating manner, while also filtering fly ash and particulate impurities in the exhaust gas, thereby improving the denitrification quality of the exhaust gas.

[0005] Technical solution: A flue gas denitrification device for waste incineration includes an incinerator, an exhaust pipe on the incinerator, a flue pipe inside the exhaust pipe, a liquid delivery pipe and a diversion pipe on the exhaust pipe, a ball valve connected between the diversion pipe and the liquid delivery pipe, a valve core on the ball valve, four spray pipes slidably connected to the flue pipe, each spray pipe rotatably connected to a rotary joint, telescopic pipes connecting the flue pipe and the four rotary joints respectively, two storage frames slidably connected to the exhaust pipe, and a rotating mechanism, a lifting mechanism and a scraping mechanism on the exhaust pipe.

[0006] Furthermore, four cavities are evenly distributed on the flue pipe.

[0007] Furthermore, the rotating mechanism includes a rotating frame, which is rotatably connected to the flue pipe. The rotating frame is equipped with a gear ring. Four rotating rods are rotatably connected to the flue pipe. Each rotating rod is slidably connected to a hexagonal rod. The four hexagonal rods are respectively connected to four spray pipes. Each of the four rotating rods is equipped with a drive gear. A transmission gear is rotatably connected to the flue pipe. A drive motor is installed on the exhaust pipe. A transmission component is connected between the output shaft of the drive motor and the transmission gear.

[0008] Furthermore, the lifting mechanism includes wave rings, four wave rings are provided on the smoke distribution pipe, each spray pipe is provided with a top rod, and a return spring is connected between the hexagonal rod and the rotating rod.

[0009] Furthermore, the scraping mechanism includes a guide frame, four guide frames are provided on the smoke distribution pipe, all four guide frames pass through the smoke exhaust pipe, a dwelling frame and a dwelling box are provided on the smoke exhaust pipe, all four guide frames are connected to the dwelling frame, the dwelling frame and the dwelling box are internally connected, each rotating rod is provided with a scraper, a sealing plate is slidably connected to the dwelling box, two tension springs are connected between the sealing plate and the smoke exhaust pipe, a reduction gearbox is provided inside the smoke exhaust pipe, the input shaft of the reduction gearbox is connected to the rotating frame, a convex plate is rotatably connected inside the smoke exhaust pipe, the output shaft of the reduction gearbox is connected to the convex plate, and four baffles are provided on the smoke distribution pipe.

[0010] Furthermore, it also includes a filtration mechanism, which is installed on the exhaust duct. The filtration mechanism includes a filter screen plate, which is installed inside the exhaust duct. A rotating shaft is rotatably connected to the exhaust duct, and a transmission rod is connected to the output shaft of the drive motor. The transmission rod is rotatably connected to the exhaust duct. Both the rotating shaft and the transmission rod are equipped with bevel gears, which mesh with each other. A second reduction gearbox is installed on the exhaust duct, and the input and output ends of the second reduction gearbox are connected to the rotating shaft. A rotating rod is installed on the output end of the second reduction gearbox. Two top plates are rotatably connected to the exhaust duct, and each of the two top plates is equipped with a spur gear. Torsion springs are connected between the two spur gears and the exhaust duct. An arc-shaped rod one and an arc-shaped rod two are slidably connected to the exhaust duct. Two toothed rods are slidably connected to the exhaust duct, and the two toothed rods are respectively connected to the arc-shaped rod one and the arc-shaped rod two, which mesh with the spur gears.

[0011] Furthermore, the top plate is equipped with several fine steel needles.

[0012] Furthermore, it also includes a cleaning mechanism. The cleaning mechanism is provided on the exhaust pipe. The cleaning mechanism includes a transmission disc. The transmission disc and the swing rod are rotatably connected on the exhaust pipe. A transmission component two is connected between the transmission disc and the rotating shaft. The swing rod is provided with two sliding grooves. A scraper is slidably connected on the exhaust pipe. The scraper is provided with a limiting post. The limiting post is engaged with one of the sliding grooves on the swing rod. The transmission disc is engaged with the other sliding groove on the swing rod.

[0013] Furthermore, it also includes an airflow velocity monitor. The exhaust duct is equipped with an airflow velocity monitor and a servo motor. The airflow velocity monitor and the servo motor are connected by a wire, and the output shaft of the servo motor is connected to the valve core.

[0014] Beneficial effects: 1. The rotation of the transmission gear will drive the gear ring to rotate, which in turn will drive the drive gear to rotate, which will drive the rotating rod to rotate, which in turn will drive the spray pipe to rotate through the hexagonal rod. This allows the spray pipe to rotate and spray the denitrification solution. In this way, the denitrification solution in the flue gas distribution chamber can be distributed more evenly, thereby improving the quality of denitrification of exhaust gas.

[0015] 2. When the arc-shaped rods 1 and 2 are compressed, they will move away from each other. This movement of the arc-shaped rods 1 and 2 will drive the rack to move, which in turn will drive the spur gear to rotate. The torsion spring will be twisted, and the rotation of the spur gear will cause the top plate mesh to swing towards the filter screen, so that the steel needles on the top plate will penetrate into the mesh of the filter screen, thereby squeezing out the impurities embedded in the mesh. In this way, fly ash and large particulate impurities in the exhaust gas can be filtered out, and the filter screen can be automatically and timely cleaned, improving the filtration quality and thus improving the denitrification quality of the exhaust gas.

[0016] 3. The rotation of the transmission disc will drive the swing arm to swing back and forth. During the swinging process, the limit post and scraper will slide back and forth. During the sliding process, the scraper will scrape the fly ash and large particles of impurities attached to the filter screen into the collection box, further cleaning the filter screen and improving the filtration efficiency of the filter screen. Attached Figure Description

[0017] Figure 1 is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 is a three-dimensional structural diagram of the drive motor, storage frame and swing arm of the present invention.

[0019] Figure 3 is a three-dimensional structural diagram of the exhaust pipe and the distribution pipe of the present invention.

[0020] Figure 4 is a three-dimensional structural diagram of the smoke pipe and spray pipe of the present invention.

[0021] Figure 5 is a three-dimensional structural diagram of the rotating frame, gear ring, and drive gear of the present invention.

[0022] Figure 6 is a three-dimensional structural diagram of the hexagonal rod, rotating rod, and return spring of the present invention.

[0023] Figure 7 is a three-dimensional structural diagram of the flow guide frame, the dwelling frame, and the dwelling box of the present invention.

[0024] Figure 8 is a three-dimensional structural diagram of the smoke exhaust pipe, the retaining frame, and the retaining box of the present invention.

[0025] Figure 9 is a three-dimensional structural diagram of the protruding plate, baffle, sealing plate and tension spring of the present invention.

[0026] Figure 10 is a three-dimensional structural diagram of the rotating shaft, bevel gear, reduction gearbox, and rotating rod of the present invention.

[0027] Figure 11 is a three-dimensional structural diagram of the arc-shaped rod one, arc-shaped rod two, and toothed rod of the present invention.

[0028] Figure 12 is a three-dimensional structural diagram of the top plate, column gear and torsion spring of the present invention.

[0029] Figure 13 is a three-dimensional structural diagram of the transmission disc, swing arm, and scraper of the present invention.

[0030] Figure 14 is a three-dimensional structural diagram of the exhaust pipe and scraper of the present invention.

[0031] Explanation of reference numerals in the attached diagram: 1-Incinerator, 2-Exhaust pipe, 3-Distribution pipe, 4-Infusion pipe, 5-Ball valve, 51-Valve core, 6-Diverter pipe, 7-Spray pipe, 8-Rotary joint, 9-Telescopic pipe, 10-Collection frame, 111-Rotating frame, 112-Gear ring, 113-Rotating rod, 1131-Hexagonal rod, 114-Drive gear, 115-Transmission gear, 116-Transmission assembly one, 117-Drive motor, 121-Wave ring, 122-Push rod, 123-Reset spring, 171-Guide frame, 172-Dwelling frame, 173-Dwelling box, 174-Scraper, 1 75-Sealing plate, 176-Tension spring, 177-Reduction gearbox one, 178-Convex plate, 179-Baffle, 131-Filter screen plate, 132-Rotating shaft, 133-Transmission rod, 134-Bevel gear, 135-Reduction gearbox two, 136-Rotating rod, 137-Top plate, 138-Spur gear, 139-Torsion spring, 1310-Arc rod one, 1311-Arc rod two, 1312-Rack rack, 141-Transmission disc, 142-Transmission assembly two, 143-Scraper rod, 144-Swing rod, 145-Limiting post, 15-Airflow velocity monitor, 16-Servo motor. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Example 1: A flue gas denitrification device for waste incineration, as shown in Figures 1-9, includes an incinerator 1, an exhaust pipe 2 on the incinerator 1, a flue pipe 3 inside the exhaust pipe 2, a liquid delivery pipe 4 and a diversion pipe 6 on the exhaust pipe 2, a ball valve 5 connected between the diversion pipe 6 and the liquid delivery pipe 4, a valve core 51 on the ball valve 5, four spray pipes 7 slidably connected to the flue pipe 3, a rotary joint 8 rotatably connected to each spray pipe 7, telescopic pipes 9 connecting the flue pipe 3 and the four rotary joints 8 respectively, two storage frames 10 slidably connected to the exhaust pipe 2, and a rotating mechanism, a lifting mechanism and a scraping mechanism on the exhaust pipe 2.

[0034] Four cavities are evenly distributed on the flue pipe 3.

[0035] The rotating mechanism includes a rotating frame 111, which is rotatably connected to the flue pipe 3. The rotating frame 111 is provided with a gear ring 112. Four rotating rods 113 are rotatably connected to the flue pipe 3. Each rotating rod 113 is slidably connected with a hexagonal rod 1131. The four hexagonal rods 1131 are respectively connected to four spray pipes 7. Each of the four rotating rods 113 is provided with a drive gear 114. A transmission gear 115 is rotatably connected to the flue pipe 3. A drive motor 117 is provided on the exhaust pipe 2. A transmission component 116 is connected between the output shaft of the drive motor 117 and the transmission gear 115.

[0036] The lifting mechanism includes a wave ring 121. Four wave rings 121 are provided on the smoke distribution pipe 3. Each spray pipe 7 is provided with a top rod 122. A return spring 123 is connected between the hexagonal rod 1131 and the rotating rod 113.

[0037] The scraping mechanism includes a guide frame 171. Four guide frames 171 are provided on the smoke distribution pipe 3. All four guide frames 171 pass through the smoke exhaust pipe 2. The smoke exhaust pipe 2 is provided with a dwelling frame 172 and a dwelling box 173. All four guide frames 171 are connected to the dwelling frame 172. The dwelling frame 172 and the dwelling box 173 are internally connected. Each rotating rod 113 is provided with a scraper 174. A sealing plate 175 is slidably connected to the dwelling box 173. Two tension springs 176 are connected between the sealing plate 175 and the smoke exhaust pipe 2. A reduction gearbox 177 is provided in the smoke exhaust pipe 2. The input shaft of the reduction gearbox 177 is connected to the rotating frame 111. A convex plate 178 is rotatably connected in the smoke exhaust pipe 2. The output shaft of the reduction gearbox 177 is connected to the convex plate 178. Four baffles 179 are provided on the smoke distribution pipe 3.

[0038] Initially, the crests of the top rod 122 and the wave ring 121 contact, the return spring 123 is stretched, the valve core 51 opens, the internal connection between the residence box 173 and the residence frame 172 is established, the bottom outlet of the residence box 173 is blocked by the sealing plate 175, and the tension spring 176 is stretched. During the operation of the incinerator 1, the waste gas generated by combustion is introduced from the top of the incinerator 1 into the flue gas duct 2, and then the waste gas is introduced into the four chambers of the flue gas distribution pipe 3, so that the waste gas is dispersed, which is conducive to better denitrification treatment of the waste gas. The user controls the output shaft of the drive motor 117 to rotate and introduce denitrification solution into the liquid delivery pipe 4. The denitrification solution is distributed into the four spray pipes 7 through the diversion pipe 6. The denitrification solution is sprayed in a mist form into the flue gas distribution pipe 3 through the nozzles provided on the spray pipes 7. The output shaft 117 rotates, driving the transmission gear 115 to rotate via the transmission assembly. The rotation of the transmission gear 115 drives the gear ring 112 to rotate, which in turn drives the drive gear 114 to rotate. The drive gear 114 then drives the rotating rod 113 to rotate. The rotation of the rotating rod 113, through the hexagonal rod 1131, drives the spray pipe 7 to rotate, thus allowing the spray pipe 7 to rotate and spray the denitrification solution. This method ensures a more uniform distribution of the denitrification solution within the flue gas distribution pipe 3, thereby improving the denitrification quality of the exhaust gas. The rotation of the spray pipe 7 drives the top rod 122 to rotate. During rotation, the top rod 122 gradually disengages from the crest of the wave ring 121. The reset spring 123 resets, causing the spray pipe 7 to move closer to the rotating rod 113. Angle rod 1131 extends into rotating rod 113. Top rod 122 continues to rotate and contacts the crest of wave ring 121 again, causing top rod 122 to drive spray pipe 7 and hexagonal rod 1131 back to their initial state. Return spring 123 is stretched again. This cycle repeats, causing spray pipe 7 to rotate and reciprocate, further ensuring a more uniform distribution of the denitrification solution in flue pipe 3, thus improving the denitrification quality of the exhaust gas. The reaction between exhaust gas and denitrification solution produces water, which adheres to the inner wall of flue pipe 3. During rotation, rotating rod 113 drives scraper 174 to rotate as well. Scraper 174 scrapes the inner wall of flue pipe 3, removing the water adhering to it. Because... The flue pipe 3 is designed with an incline. Water scraped off by the scraper 174 collects and leaks into the guide frame 171. The water flowing into the guide frame 171 then flows into the retention frame 172. During the rotation of the rotating frame 111, the input shaft of the reduction gearbox 177 rotates, and the output shaft of the reduction gearbox 177 rotates the convex plate 178. Due to the speed reduction of the reduction gearbox 177, there is a rotation ratio between the rotating frame 111 and the convex plate 178. After the retention box 173 is filled with liquid, the liquid in the retention frame 172 increases, and the concave area of ​​the convex plate 178 rotates to face the sealing plate 175. The reset spring 123 returns to its original position and pulls the sealing plate 175 into the flue pipe 3, thus separating the liquid in the retention box 173 and the retention frame 172.As the sealing plate 175 continues to move, the bottom of the retention box 173 opens, allowing the liquid in the retention box 173 to be discharged to the outside. This method ensures the timely removal of water produced by the denitrification reaction, preventing excessive water leakage from the flue pipe 3. Simultaneously, it prevents exhaust gas leakage during drainage, further improving the denitrification quality of the exhaust gas. The protruding plate 178 continues to rotate, pressing the sealing plate 175 and causing it to extend out of the flue pipe 3 and reset. The tension spring 176 is stretched. During the reset process, the sealing plate 175 first blocks the bottom outlet of the retention box 173. Then, the retention frame 172 and the retention box 173 connect, and the liquid in the retention frame 172 flows into the retention box 173, completing the reset. This process repeats, achieving intermittent drainage.

[0039] Example 2: Based on Example 1, as shown in Figures 10-14, it further includes a filtering mechanism. The filtering mechanism is installed on the exhaust duct 2 and includes a filter screen 131. The filter screen 131 is installed inside the exhaust duct 2. A rotating shaft 132 is rotatably connected to the exhaust duct 2. A transmission rod 133 is connected to the output shaft of the drive motor 117. The transmission rod 133 and the exhaust duct 2 are rotatably connected. Both the rotating shaft 132 and the transmission rod 133 are equipped with bevel gears 134, which mesh with each other. A second reduction gearbox 135 is installed on the exhaust duct 2. 5. The input and output ends are connected to the rotating shaft 132. The output end of the reduction gearbox 2 135 is equipped with a rotating rod 136. Two top plates 137 are rotatably connected to the exhaust pipe 2. Both top plates 137 are equipped with spur gears 138. Torsion springs 139 are connected between the two spur gears 138 and the exhaust pipe 2. Arc rod 1 1310 and arc rod 2 1311 are slidably connected to the exhaust pipe 2. Two racks 1312 are slidably connected to the exhaust pipe 2. The two racks 1312 are connected to arc rod 1 1310 and arc rod 2 1311 respectively. The racks 1312 and the spur gears 138 mesh.

[0040] The top plate 137 is equipped with several thin steel needles.

[0041] It also includes a cleaning mechanism. The smoke exhaust pipe 2 is equipped with a cleaning mechanism, which includes a transmission disc 141. The transmission disc 141 and the swing rod 144 are rotatably connected to the smoke exhaust pipe 2. A transmission assembly 142 is connected between the transmission disc 141 and the rotating shaft 132. The swing rod 144 is provided with two sliding grooves. The smoke exhaust pipe 2 is slidably connected with a scraper 143. The scraper 143 is provided with a limiting post 145. The limiting post 145 is engaged with one of the sliding grooves on the swing rod 144. The transmission disc 141 is engaged with the other sliding groove on the swing rod 144.

[0042] It also includes an airflow velocity monitor 15. The exhaust duct 2 is equipped with an airflow velocity monitor 15 and a servo motor 16. The airflow velocity monitor 15 and the servo motor 16 are connected by a wire. The output shaft of the servo motor 16 is connected to the valve core 51.

[0043] After the exhaust gas enters the exhaust duct 2, it passes through the filter screen 131. Fly ash and particulate matter in the exhaust gas are intercepted on the filter screen 131. The output shaft of the drive motor 117 rotates, which drives the transmission rod 133 to rotate. The rotation of the transmission rod 133 drives one of the bevel gears 134 to rotate. The rotation of one bevel gear 134 drives the other bevel gear 134 to rotate. The rotation of the other bevel gear 134 drives the rotating shaft 132 to rotate. The rotation of the rotating shaft 132 drives the rotating rod 136 to rotate through the reduction gearbox 135. During the rotation of the rotating rod 136, it will come into contact with the first arc rod 1310 and the second arc rod 1311 respectively. The rotating rod 136 will squeeze the first arc rod 1310 and the second arc rod 1311. The arc rod 1310 and the second arc rod 1311 will move away from each other due to the compression. The movement of the first curved rod 1310 and the second curved rod 1311 will drive the rack 1312 to move. The movement of the rack 1312 will drive the spur gear 138 to rotate, and the torsion spring 139 will be twisted. The rotation of the spur gear 138 will cause the top plate 137 to swing closer to the filter screen plate 131, so that the steel needles on the top plate 137 will extend into the mesh of the filter screen plate 131, thereby squeezing out the impurities embedded in the mesh of the filter screen plate 131. After the rotating rod 136 disengages from the first curved rod 1310 and the second curved rod 1311, the torsion spring 139 will reset, which will drive the spur gear 138 and the top plate 137 to reset. In this way, fly ash and large particulate impurities in the exhaust gas can be filtered out, and the filter screen plate 131 can be automatically and timely cleaned, improving the filtration quality and thus improving the denitrification quality of the exhaust gas.

[0044] The rotation of the shaft 132 drives the transmission disc 141 to rotate via the transmission assembly 142. The rotation of the transmission disc 141 causes the swing arm 144 to swing back and forth. During the swinging process of the swing arm 144, the limit post 145 and the scraper 143 will slide back and forth. During the sliding process of the scraper 143, the fly ash and large particles attached to the filter screen 131 will be scraped into the collection frame 10, further cleaning the filter screen 131 and improving the filtration efficiency of the filter screen 131. When the exhaust gas enters the flue gas duct 2, it will be monitored by the airflow velocity monitor 15. When the exhaust gas flow is low or high, the airflow velocity monitor 15 will drive the output shaft of the servo motor 16 to rotate. The rotation of the output shaft of the servo motor 16 will drive the valve core 51 to rotate. The rotation of the valve core 51 will change the size of the flow port of the ball valve 5, thereby controlling the amount of denitrification solution sprayed according to the exhaust gas flow, thus avoiding waste of denitrification solution.

[0045] It should be understood that the above description is for illustrative purposes only and is not intended to limit the invention. Those skilled in the art will understand that variations of the invention are included within the scope of the claims herein.

Claims

1. A flue gas denitrification device for waste incineration, characterized in that, It includes an incinerator (1), an exhaust pipe (2) on the incinerator (1), a distribution pipe (3) inside the exhaust pipe (2), an infusion pipe (4) and a diversion pipe (6) on the exhaust pipe (2), a ball valve (5) connecting the diversion pipe (6) and the infusion pipe (4), a valve core (51) on the ball valve (5), four spray pipes (7) slidably connected to the distribution pipe (3), a rotary joint (8) rotatably connected to each spray pipe (7), and telescopic pipes (9) connecting the distribution pipe (3) and the four rotary joints (8) respectively. The system has two storage frames (10) and a rotating mechanism, a lifting mechanism, and a scraping mechanism on the exhaust pipe (2). The rotating mechanism includes a rotating frame (111), which is rotatably connected to the distribution pipe (3). The rotating frame (111) is equipped with a gear ring (112), and four rotating rods (113) are rotatably connected to the distribution pipe (3). Each rotating rod (113) is slidably connected to a hexagonal rod (1131), and the four hexagonal rods (1131) are respectively connected to four spray pipes (7). The lifting mechanism includes a wave ring (121), and the distribution pipe (3) is equipped with a rotating frame (111). The spray pipe (7) is equipped with four wave rings (121), and each spray pipe (7) is equipped with a top rod (122). A return spring (123) is connected between the hexagonal rod (1131) and the rotating rod (113). The scraping mechanism includes a guide frame (171). The smoke distribution pipe (3) is equipped with four guide frames (171). The four guide frames (171) all pass through the smoke exhaust pipe (2). The smoke exhaust pipe (2) is equipped with a dwelling frame (172) and a dwelling box (173). The four guide frames (171) are all connected to the dwelling frame (172). The dwelling frame (172) and the dwelling box (173) are internally connected. Each rotating rod (113) is equipped with a scraper (174), and a sealing plate (175) is slidably connected to the dwell box (173). Two tension springs (176) are connected between the sealing plate (175) and the exhaust pipe (2). A reduction gearbox (177) is installed inside the exhaust pipe (2). The input shaft of the reduction gearbox (177) is connected to the rotating frame (111). A convex plate (178) is rotatably connected inside the exhaust pipe (2). The output shaft of the reduction gearbox (177) is connected to the convex plate (178). Four baffles (179) are installed on the smoke distribution pipe (3).It also includes a filtration mechanism. The exhaust pipe (2) is equipped with a filtration mechanism, which includes a filter screen (131). The exhaust pipe (2) is equipped with a filter screen (131). A rotating shaft (132) is rotatably connected to the exhaust pipe (2). A transmission rod (133) is connected to the output shaft of the drive motor (117). The transmission rod (133) and the exhaust pipe (2) are rotatably connected. Both the rotating shaft (132) and the transmission rod (133) are equipped with bevel gears (134). The two bevel gears (134) mesh with each other. A second reduction gearbox (135) is provided on the exhaust pipe (2). The input and output ends of the second reduction gearbox (135) are connected to the rotating shaft (132). A rotating rod (136) is provided on the output end of the second reduction gearbox (135). Two top plates (137) are rotatably connected to the exhaust pipe (2). The top plate (137) is equipped with a spur gear (138), and a torsion spring (139) is connected between the two spur gears (138) and the exhaust pipe (2). An arc-shaped rod one (1310) and an arc-shaped rod two (1311) are slidably connected to the exhaust pipe (2). Two toothed rods (1312) are slidably connected to the exhaust pipe (2), and the two toothed rods (1312) are respectively connected to the arc-shaped rod one (1310) and the arc-shaped rod two (1311). The toothed rods (1312) mesh with the spur gears (138). The top plate (137) is equipped with several fine steel needles. A cleaning mechanism is also included, with a cleaning mechanism on the exhaust pipe (2). The cleaning mechanism includes a scraper (143), which is slidably connected to the exhaust pipe (2). The scraper (143) is used to clean the filter screen (131).

2. The flue gas denitrification device for waste incineration as described in claim 1, characterized in that, The flue pipe (3) has four cavities evenly distributed on it.

3. The flue gas denitrification device for waste incineration as described in claim 1, characterized in that, The rotating mechanism also includes a drive gear (114), and each of the four rotating rods (113) is provided with a drive gear (114). A transmission gear (115) is rotatably connected to the flue pipe (3), and a drive motor (117) is provided on the exhaust pipe (2). A transmission assembly (116) is connected between the output shaft of the drive motor (117) and the transmission gear (115).

4. The flue gas denitrification device for waste incineration as described in claim 3, characterized in that, The cleaning mechanism also includes a transmission disc (141), a drive disc (141) and a swing rod (144) are rotatably connected on the exhaust pipe (2), a transmission assembly (142) is connected between the transmission disc (141) and the rotating shaft (132), the swing rod (144) is provided with two sliding grooves, a scraper (143) is slidably connected on the exhaust pipe (2), a limit post (145) is provided on the scraper (143), the limit post (145) is engaged with one of the sliding grooves on the swing rod (144), and the transmission disc (141) is engaged with the other sliding groove on the swing rod (144).

5. The flue gas denitrification device for waste incineration as described in claim 4, characterized in that, It also includes an airflow velocity monitor (15), and the exhaust pipe (2) is equipped with an airflow velocity monitor (15) and a servo motor (16). The airflow velocity monitor (15) and the servo motor (16) are connected by a wire, and the output shaft of the servo motor (16) is connected to the valve core (51).

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