Anti-blocking spraying device for SNCR (selective non-catalytic reduction) denitration treatment of waste incineration flue gas

Abstract

The invention relates to the technical field of flue gas treatment, in particular to an anti-blocking spraying device for SNCR (selective non-catalytic reduction) denitration treatment of waste incineration flue gas, which comprises an incinerator, a smoke exhaust channel is arranged at the upper end of the incinerator, a flow dividing assembly is arranged in the smoke exhaust channel, the flow dividing assembly comprises a spraying mechanism and a rotational flow mechanism, and the spraying mechanism comprises a flow dividing block, a flow dividing hole and a spray head. The flow dividing block is installed in the smoke discharging channel, the multiple flow dividing holes are formed in the upper end of the flow dividing block, the pair of rotating frames are installed in the flow dividing holes, the spraying pipe is rotationally connected into the rotating frames, and the multiple spraying heads are all installed on the spraying pipe; the cyclone mechanism comprises flow guide discs and cyclone blades, the flow guide discs are all installed on the circumferential face of the spraying pipe, and the cyclone blades are installed at the lower ends of the flow guide discs. Flue gas is divided, the size of each flue gas is reduced, after the flue gas passes through a water curtain formed by three layers of reaction liquid, the flue gas can make full contact with the reaction liquid, and therefore the reaction liquid can be fully separated, and the reaction effect is improved. The denitration effect on the flue gas is improved.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas treatment, and more specifically to an anti-blocking spray device for SNCR denitration treatment of waste incineration flue gas. Background Art

[0002] Waste incineration is the process of reducing the volume of waste through oxidation at high temperature through appropriate thermal decomposition, combustion, melting and other reactions, turning it into residue or molten solid matter. Waste incineration facilities must be equipped with flue gas denitrification treatment facilities to prevent heavy metals, organic pollutants, etc. from being discharged into the environmental medium again, and to recover the heat generated by waste incineration to achieve the purpose of waste resource utilization.

[0003] The shortcomings of the existing technology: Most of the existing flue gas denitrification methods use spraying reaction liquid in the flue to react with the flue gas to remove sulfur dioxide in the flue gas. However, in actual use, the range of spraying the reaction liquid is limited, and the contact with the flue gas is not sufficient, resulting in poor flue gas treatment effect. For this reason, we propose an anti-blocking spray device for SNCR denitrification treatment of waste incineration flue gas. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an anti-blocking spray device for SNCR denitrification treatment of waste incineration flue gas to solve the problems existing in the above-mentioned background technology.

[0005] The present invention provides the following technical solution: an anti-blocking spray device for SNCR denitrification treatment of waste incineration flue gas, comprising an incinerator 1, a smoke exhaust channel 101 is arranged at the upper end of the incinerator 1, a diverter assembly 2 is arranged in the smoke exhaust channel 101, the diverter assembly 2 comprises a spray mechanism 21 and a swirl mechanism 22, the spray mechanism 21 comprises a diverter block 211, a diverter hole 212, a rotating frame 213, a spray pipe 214 and a nozzle 215, the diverter block 211 is installed in the smoke exhaust channel 101, a plurality of diverter holes 212 are opened at the upper end of the diverter block 211, a pair of rotating frames 213 are installed in the diverter holes 212, a spray pipe 214 is rotatably connected in the rotating frame 213, and a plurality of nozzles 215 are installed on the spray pipe 214;

[0006] The swirl mechanism 22 includes a guide plate 221 and swirl blades 222. A plurality of guide plates 221 are mounted on the circumferential surface of the spray pipe 214. A plurality of swirl blades 222 are mounted on the lower end of the guide plate 221. The plurality of guide plates 221 are located below the corresponding position of the spray head 215.

[0007] Preferably, a connecting rod 216 is installed on the circumferential surface of the spray pipe 214 , and a scraper rod 217 is installed on one end of the connecting rod 216 away from the spray pipe 214 , and the scraper rod 217 is slidably connected to the diversion hole 212 .

[0008] Preferably, a support frame 3 is installed on the left side of the smoke exhaust channel 101, and a liquid supply mechanism 31 is arranged on the upper end of the support frame 3. The liquid supply mechanism 31 includes a first water pump 301, a second water pump 302, a mixing tube 303, a water tray 304 and a diversion pipe 307. The first water pump 301 and the second water pump 302 are both installed on the support frame 3, the mixing tube 303 and the water tray 304 are both installed on the support frame 3 through a mounting seat, the first water pump 301 and the second water pump 302 are both connected to the mixing tube 303 through an input pipe 305, the mixing tube 303 and the water tray 304 are connected through a connecting pipe 306, and multiple diversion pipes 307 are installed at the output end of the water tray 304.

[0009] Preferably, a rotating joint 308 is installed at the upper end of the spray pipe 214 , and one end of the rotating joint 308 away from the spray pipe 214 is connected to the corresponding diversion pipe 307 .

[0010] Preferably, a bidirectional motor 4 is installed at the upper end of the support frame 3, and a first driving shaft 401 is installed at the left output end of the bidirectional motor 4. The first driving shaft 401 is installed with a rotating shaft 402 through a coupling. The rotating shaft 402 is rotatably connected to the mixing tube 303. The rotating seat 403 installed in the mixing tube 303 is rotatably connected to the rotating shaft 402, and a plurality of stirring rods 404 are installed on the circumferential surface of the rotating shaft 402.

[0011] Preferably, a second drive shaft 5 is installed at the right output end of the bidirectional motor 4, and a drive rod 501 is installed on the second drive shaft 5 through a coupling. A first bevel gear 502 is installed on the circumferential surface of the drive rod 501, and a second bevel gear 503 is installed on the circumferential surface of the spray pipe 214, and the first bevel gear 502 is meshed with the second bevel gear 503.

[0012] Preferably, the circumferential surface of the spray pipe 214 is installed with a mounting ring 504 , the circumferential surface of the mounting ring 504 is installed with a plurality of inclined plates 505 , a gear ring 506 is installed at one end of the inclined plate 505 away from the mounting ring 504 , and the central gear ring 506 is meshed with the peripheral gear ring 506 .

[0013] Preferably, a connecting column 6 is rotatably connected in the smoke exhaust channel 101, a blocking plate 601 is installed on the circumferential surface of the connecting column 6, a servo motor 602 is installed at the lower end of the support frame 3, a linkage rod 603 is installed at the output end of the servo motor 602, the linkage rod 603 is connected to the connecting column 6 through a sprocket set 604, and a plurality of diversion pipes 307 are provided with solenoid valves 605 on their surfaces.

[0014] Technical effects and advantages of the present invention:

[0015] 1. The present invention can divide the upwardly flowing flue gas into multiple flue gas streams through the diverter hole 212, and discharge the flue gas separately, thereby reducing the volume of each flue gas stream. At this time, by controlling the spray pipe 214 to rotate at a high speed in the rotating frame 213, and spraying the reaction liquid through the nozzle 215, three circular water curtains will be formed. When the flue gas is discharged upward through the diverter hole 212, it will pass through the water curtain formed by the three layers of reaction liquid. At the same time, when the flue gas in the diverter hole 212 flows upward, it will pass through the water curtain formed by the three layers of reaction liquid under the action of the guide plate 221. The center of the flue gas before the water curtain will diffuse to the surroundings, making the center of the flue gas hollow at this time, thereby reducing the thickness of the flue gas and causing the flue gas to flow upward in a cylindrical shape. At the same time, under the action of the swirl blades 222, the flue gas will flow upward in a spiral manner that fits the surface of the diverter hole 212 when in contact with the reaction liquid. Without affecting the flue gas flow rate, the speed of the flue gas passing through the diverter hole 212 is slowed down. After the flue gas passes through the water curtain formed by the three layers of reaction liquid, the flue gas can fully contact with the reaction liquid, thereby improving the denitrification effect of the flue gas.

[0016] 2. The present invention controls the operation of the servo motor 602, and the servo motor 602 will drive the linkage rod 603 to rotate. The linkage rod 603 will drive the connecting column 6 to rotate under the action of the sprocket group 604, and the connecting column 6 will drive the blocking plate 601 at the corresponding position to rotate, thereby completing the blocking of part of the diversion holes 212, thereby reducing the channel for smoke emission, and at the same time controlling the operation of the solenoid valve 605 at the corresponding position of the blocked diversion hole 212 to complete the blocking of the diversion pipe 307 at the corresponding position, and stop the transportation of the reaction liquid to the spray pipe 214 at the corresponding position, thereby achieving the effect of adjusting the spraying amount of the reaction liquid according to the smoke volume, avoiding excessive waste and consumption of the reaction liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of a cross-section of an incinerator in the present invention;

[0019] Figure 3 is a schematic diagram of the spray mechanism in the present invention;

[0020] Figure 4 is a schematic diagram of the flow diversion component in the present invention;

[0021] Figure 5 For the present invention Figure 4 Schematic diagram of part A;

[0022] Figure 6 is a schematic diagram of the gear ring in the present invention;

[0023] Figure 7is a schematic diagram of the liquid supply mechanism in the present invention;

[0024] Figure 8 is a schematic diagram of a cross-section of a mixing tube in the present invention;

[0025] Fig. 9 It is a schematic diagram of the blocking plate in the present invention.

[0026] The accompanying drawings are marked as follows: 1, incinerator; 101, smoke exhaust channel; 2, diversion assembly; 21, spray mechanism; 211, diversion block; 212, diversion hole; 213, rotating frame; 214, spray pipe; 215, nozzle; 216, connecting rod; 217, scraper rod; 22, swirl mechanism; 221, guide plate; 222, swirl blade; 3, support frame; 31, liquid supply mechanism; 301, first water pump; 302, second water pump; 303, mixing tube; 304, water tray; 305, input pipe; 306, connecting pipe; 307, shunt pipe; 308, rotating joint; 4, bidirectional motor; 401, first drive shaft; 402, rotating shaft; 403, rotating seat; 404, stirring rod; 5, second drive shaft; 501, driving rod; 502, first bevel gear; 503, second bevel gear; 504, mounting ring; 505, bevel plate; 506, gear ring; 6, connecting column; 601, blocking plate; 602, servo motor; 603, linkage rod; 604, sprocket assembly; 605, solenoid valve. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The anti-blocking spray device for SNCR denitrification treatment of waste incineration flue gas involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0028] like Figure 1-5 As shown, in one embodiment, a blocking-proof spray device for SNCR denitration treatment of waste incineration flue gas is proposed, including an incinerator 1, a smoke exhaust channel 101 is arranged at the upper end of the incinerator 1, a diverter assembly 2 is arranged in the smoke exhaust channel 101, the diverter assembly 2 includes a spray mechanism 21 and a swirl mechanism 22, the spray mechanism 21 includes a diverter block 211, a diverter hole 212, a rotating frame 213, a spray pipe 214 and a nozzle 215, the diverter block 211 is installed in the smoke exhaust channel 101, a plurality of diverter holes 212 are opened at the upper end of the diverter block 211, a pair of rotating frames 213 are installed in the diverter holes 212, a spray pipe 214 is rotatably connected in the rotating frame 213, and a plurality of nozzles 215 are installed on the spray pipe 214;

[0029] The swirl mechanism 22 includes a guide plate 221 and swirl blades 222. A plurality of guide plates 221 are installed on the circumferential surface of the spray pipe 214. A plurality of swirl blades 222 are installed at the lower end of the guide plate 221. The plurality of guide plates 221 are located below the corresponding nozzles 215.

[0030] In actual application of the embodiment of the present invention, during garbage incineration, the smoke generated by the incineration will be discharged upward through the smoke exhaust channel 101 on the incinerator 1. The smoke generated at this time will enter the diversion hole 212 in the diversion block 211. Under the action of the diversion hole 212, the smoke flowing upward can be divided into multiple flue gases, and the flue gases are discharged separately, thereby reducing the volume of each flue gas. At this time, the spray pipe 214 is controlled to rotate at a high speed in the rotating frame 213, and the reaction liquid is sprayed out through the nozzle 215. Since a plurality of nozzles 215 are arranged on the circumferential surface of the spray pipe 214, and the plurality of nozzles 215 are divided into three groups, and the heights of each group of nozzles 215 are different, three circular flue gases are formed in the corresponding diversion holes 212. shaped water curtain. When the flue gas is discharged upward through the diverter hole 212, it will pass through the water curtain formed by the three layers of reaction liquid. At the same time, when the flue gas in the diverter hole 212 flows upward, under the action of the guide plate 221, the center of the flue gas will diffuse to the surroundings before each layer of water curtain, so that the center position of the flue gas at this time is hollow, thereby reducing the thickness of the flue gas, and causing the flue gas to flow upward in a cylindrical shape. At the same time, under the action of the swirl blades 222, the flue gas flows upward in a spiral manner that fits the surface of the diverter hole 212 when in contact with the reaction liquid. Without affecting the flue gas flow rate, the speed of the flue gas passing through the diverter hole 212 is slowed down. After the flue gas passes through the water curtain formed by the three layers of reaction liquid, the flue gas can be fully in contact with the reaction liquid, thereby improving the denitrification effect of the flue gas.

[0031] like Figure 3 and 4 As shown, as a preferred embodiment of the present invention, a connecting rod 216 is installed on the circumferential surface of the spray pipe 214, and a scraper rod 217 is installed at one end of the connecting rod 216 away from the spray pipe 214. The scraper rod 217 is slidably connected to the diversion hole 212.

[0032] When the embodiment of the present invention is actually used, when the spray pipe 214 rotates, it will drive the connecting rod 216 to rotate, and the connecting rod 216 will drive the scraper rod 217 to rotate, so that it can slide with the surface of the diverter hole 212, and then the impurities on the surface of the diverter hole 212 can be cleaned in real time to prevent the impurities from adhering to the surface of the diverter hole 212. After accumulation, the diverter hole 212 will be blocked, affecting the emission of smoke and the trajectory of smoke emission.

[0033] like Figure 7 and 8As shown, as another preferred embodiment of the present invention, a support frame 3 is installed on the left side of the smoke exhaust channel 101, and a liquid supply mechanism 31 is arranged on the upper end of the support frame 3. The liquid supply mechanism 31 includes a first water pump 301, a second water pump 302, a mixing tube 303, a water tray 304 and a diverter pipe 307. The first water pump 301 and the second water pump 302 are both installed on the support frame 3, the mixing tube 303 and the water tray 304 are both installed on the support frame 3 through a mounting seat, the first water pump 301 and the second water pump 302 are both connected to the mixing tube 303 through an input pipe 305, the mixing tube 303 and the water tray 304 are connected through a connecting pipe 306, and a plurality of diverter pipes 307 are installed at the output end of the water tray 304.

[0034] In actual application, the embodiment of the present invention controls the operation of the first water pump 301 and the second water pump 302 so that the first water pump 301 and the second water pump 302 respectively extract the reaction liquid and water in proportion, and then extract the reaction liquid and water together into the mixing tube 303 through the input pipe 305, and then complete the mixing during the transportation in the mixing tube 303, and then, under the action of the connecting pipe 306, the mixed reaction liquid is transported to the water tray 304, and finally transported to the corresponding spray pipe 214 through multiple branch pipes 307, so that the nozzle 215 on the spray pipe 214 sprays the reaction liquid to contact the flue gas to achieve the denitrification effect on the flue gas.

[0035] like Figure 2 and 7 As shown, as another preferred embodiment of the present invention, a rotating joint 308 is installed at the upper end of the spray pipe 214, and one end of the rotating joint 308 away from the spray pipe 214 is connected to the corresponding diversion pipe 307.

[0036] In actual application, the embodiment of the present invention is connected to the corresponding shunt pipe 307 by a rotating joint 308, so that when the spray pipe 214 rotates at a high speed, the transportation of the reaction liquid will not be affected.

[0037] like Figure 8 As shown, as another preferred embodiment of the present invention, a bidirectional motor 4 is installed on the upper end of the support frame 3, a first driving shaft 401 is installed on the left output end of the bidirectional motor 4, the first driving shaft 401 is installed with a rotating shaft 402 through a coupling, the rotating shaft 402 is rotatably connected to the mixing tube 303, a rotating seat 403 installed in the mixing tube 303 is rotatably connected to the rotating shaft 402, and a plurality of stirring rods 404 are installed on the circumferential surface of the rotating shaft 402.

[0038] In actual application of the embodiment of the present invention, when the reaction liquid and water are extracted into the mixing tube 303 together, since the water pipes for conveying the reaction liquid and water are arranged in opposite directions, the reaction liquid and water will first be offset and then conveyed in the mixing tube 303. At this time, under the action of the bidirectional motor 4, when the bidirectional motor 4 drives the first drive shaft 401 to rotate, the first drive shaft 401 will drive the rotating shaft 402 to rotate through the coupling, and the rotating shaft 402 will drive the stirring rod 404 to rotate, stirring the liquid in the mixing tube 303, thereby promoting the mixing effect of the reaction liquid and water.

[0039] like Figure 2 and 3 As shown, as another preferred embodiment of the present invention, a second drive shaft 5 is installed at the right output end of the bidirectional motor 4, and a drive rod 501 is installed on the second drive shaft 5 through a coupling. A first bevel gear 502 is installed on the circumferential surface of the drive rod 501, and a second bevel gear 503 is installed on the circumferential surface of the spray pipe 214, and the first bevel gear 502 is meshed with the second bevel gear 503.

[0040] In actual application of the embodiment of the present invention, when the bidirectional motor 4 is running, the bidirectional motor 4 will simultaneously drive the second drive shaft 5 to rotate, and the second drive shaft 5 will drive the drive rod 501 to rotate through the action of the coupling, and the drive rod 501 will drive the spray pipe 214 to rotate through the action of the first bevel gear 502 and the second bevel gear 503, thereby achieving the effect of making the reaction liquid sprayed from the nozzle 215 form a water curtain.

[0041] like Figure 3 and 6 As shown, as another preferred embodiment of the present invention, the circumferential surface of the spray pipe 214 is installed with a mounting ring 504, the circumferential surface of the mounting ring 504 is installed with a plurality of inclined plates 505, a gear ring 506 is installed at one end of the inclined plate 505 away from the mounting ring 504, and the central gear ring 506 is meshed with the peripheral gear ring 506.

[0042] In actual application of the embodiment of the present invention, when the spray pipe 214 in the middle part rotates, the toothed ring 506 in the middle part will be driven to rotate under the action of the mounting ring 504 and the inclined plate 505, and then the toothed ring 506 in the middle part will simultaneously drive the toothed rings 506 around to rotate, thereby achieving the effect of driving multiple spray pipes 214 to rotate. Since the size difference between the middle toothed ring 506 and the peripheral toothed ring 506 is not large, the rotation speed difference between the central spray pipe 214 and the peripheral spray pipe 214 is basically the same, which will not affect the formation of multiple water curtains. When the multiple gear rings 506 rotate, the inclined plates 505 will also rotate simultaneously. Since each group of inclined plates 505 corresponds to a diverter hole 212, the inclined plates 505 can have the effect of blowing air upwards when they rotate, so that the diverter hole 212 is in a state of nearly negative pressure, and each diverter hole 212 can be in a state of attracting flue gas, thereby promoting the flue gas to enter the multiple diverter holes 212 more evenly, avoiding a large difference in the amount of flue gas passing through the diverter holes 212, making the contact effect between the flue gas and the reaction liquid more even, thereby improving the denitrification effect of the flue gas.

[0043] like Figure 7 and 9 As shown, as another preferred embodiment of the present invention, a connecting column 6 is rotatably connected in the smoke exhaust channel 101, a blocking plate 601 is installed on the circumferential surface of the connecting column 6, a servo motor 602 is installed at the lower end of the support frame 3, a linkage rod 603 is installed at the output end of the servo motor 602, the linkage rod 603 is connected to the connecting column 6 by a sprocket set 604, and a plurality of diversion pipes 307 are provided with solenoid valves 605 on their surfaces.

[0044] In actual application of the embodiment of the present invention, when the amount of flue gas generated by garbage incineration is small, the servo motor 602 can be controlled to operate, and the servo motor 602 will drive the linkage rod 603 to rotate. The linkage rod 603 will drive the connecting column 6 to rotate under the action of the sprocket group 604, and the connecting column 6 will drive the blocking plate 601 at the corresponding position to rotate, so as to complete the blocking of part of the diversion hole 212, thereby reducing the channel for flue gas emission. At the same time, the solenoid valve 605 at the position corresponding to the blocked diversion hole 212 is controlled to operate, so as to complete the blocking of the diversion pipe 307 at the corresponding position, and stop the delivery of the reaction liquid to the spray pipe 214 at the corresponding position, thereby achieving the effect of adjusting the spraying amount of the reaction liquid according to the amount of flue gas, thereby avoiding excessive waste and consumption of the reaction liquid.

[0045] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0046] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0047] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any 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 spray device for preventing blockage in SNCR denitration of waste incineration flue gas, comprising an incinerator (1), characterized in that: The incinerator (1) is provided with a smoke exhaust passage (101) at the upper end thereof, a flow diversion assembly (2) is provided in the smoke exhaust passage (101), the flow diversion assembly (2) comprises a spray mechanism (21) and a swirl mechanism (22), the spray mechanism (21) comprises a flow diversion block (211), a flow diversion hole (212), a rotating frame (213), a spray pipe (214) and a spray head (215), the flow diversion block (211) is installed in the smoke exhaust passage (101), a plurality of flow diversion holes (212) are provided at the upper end of the flow diversion block (211), a pair of rotating frames (213) are installed in the flow diversion holes (212), the spray pipe (214) is rotatably connected in the rotating frame (213), and a plurality of spray heads (215) are installed on the spray pipe (214); The swirl mechanism (22) comprises a guide plate (221) and swirl blades (222); a plurality of the guide plates (221) are mounted on the circumferential surface of the spray pipe (214); a plurality of the swirl blades (222) are mounted on the lower end of the guide plate (221); and a plurality of the guide plates (221) are located below the corresponding spray heads (215).

2. The anti-blocking spray device for SNCR denitrification treatment of waste incineration flue gas according to claim 1, characterized in that: A connecting rod (216) is installed on the circumferential surface of the spray pipe (214), and a scraper rod (217) is installed on one end of the connecting rod (216) away from the spray pipe (214), and the scraper rod (217) is slidably connected to the diversion hole (212).

3. The anti-blocking spray device for SNCR denitrification treatment of waste incineration flue gas according to claim 1, characterized in that: A support frame (3) is installed on the left side of the smoke exhaust channel (101), and a liquid supply mechanism (31) is arranged on the upper end of the support frame (3). The liquid supply mechanism (31) comprises a first water pump (301), a second water pump (302), a mixing pipe (303), a water tray (304) and a diverter pipe (307). The first water pump (301) and the second water pump (302) are both installed on the support frame (3), and the mixing pipe (303) and the water tray (304) are both installed on the support frame (3) through a mounting seat. The first water pump (301) and the second water pump (302) are both connected to the mixing pipe (303) through an input pipe (305), and the mixing pipe (303) and the water tray (304) are connected through a connecting pipe (306), and a plurality of diverter pipes (307) are all installed at the output end of the water tray (304).

4. The anti-blocking spray device for SNCR denitration of waste incineration flue gas according to claim 3, characterized in that: A rotating joint (308) is installed at the upper end of each of the spray pipes (214), and one end of the rotating joint (308) away from the spray pipe (214) is connected to a corresponding diversion pipe (307).

5. The anti-blocking spray device for SNCR denitration treatment of waste incineration flue gas according to claim 3, characterized in that: A bidirectional motor (4) is installed at the upper end of the support frame (3); a first driving shaft (401) is installed at the left output end of the bidirectional motor (4); a rotating shaft (402) is installed on the first driving shaft (401) via a coupling; the rotating shaft (402) is rotatably connected to the mixing tube (303); a rotating seat (403) installed in the mixing tube (303) is rotatably connected to the rotating shaft (402); and a plurality of stirring rods (404) are installed on the circumferential surface of the rotating shaft (402).

6. The anti-blocking spray device for SNCR denitration treatment of waste incineration flue gas according to claim 5, characterized in that: A second drive shaft (5) is installed at the right output end of the bidirectional motor (4); a drive rod (501) is installed on the second drive shaft (5) via a coupling; a first bevel gear (502) is installed on the circumferential surface of the drive rod (501); a second bevel gear (503) is installed on the circumferential surface of the spray pipe (214); and the first bevel gear (502) is meshed with the second bevel gear (503).

7. The anti-blocking spray device for SNCR denitration of waste incineration flue gas according to claim 6, characterized in that: The circumferential surface of the spray pipe (214) is equipped with a mounting ring (504), and the circumferential surface of the mounting ring (504) is equipped with a plurality of inclined plates (505). One end of the inclined plate (505) away from the mounting ring (504) is equipped with a gear ring (506), and the central gear ring (506) is meshed with the peripheral gear ring (506).

8. The anti-blocking spray device for SNCR denitration treatment of waste incineration flue gas according to claim 7, characterized in that: A connecting column (6) is rotatably connected in the smoke exhaust channel (101), and a blocking plate (601) is installed on the circumferential surface of the connecting column (6). A servo motor (602) is installed at the lower end of the support frame (3), and a linkage rod (603) is installed at the output end of the servo motor (602). The linkage rod (603) is connected to the connecting column (6) via a sprocket set (604), and a plurality of solenoid valves (605) are arranged on the surface of the diverter pipes (307).

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