Flue gas denitration device

Abstract

The invention discloses a flue gas denitration device which comprises a supporting base, a flue gas pretreatment mechanism is arranged at the top of the supporting base, a flue gas denitration mechanism located on the right side of the flue gas pretreatment mechanism is arranged at the top of the supporting base, and a denitration agent storage mechanism located on the right side of the flue gas denitration mechanism is arranged at the top of the supporting base. The flue gas pretreatment mechanism comprises a supporting table, the supporting table is fixedly mounted at the top of the supporting base, and a fixed gas inlet cylinder is fixedly mounted on the inner wall of the supporting table. Through the overall design of the flue gas pretreatment mechanism, a movable filter cylinder and a fixed air inlet cylinder can be automatically disconnected, then reverse inflation cleaning can be conducted on an annular filter piece by means of an external air source, meanwhile, a brush is driven by power of the air source to rotate, brushing cleaning is conducted on the inner wall of the annular filter piece, and the cleaning efficiency is improved. The function of automatically and fully cleaning the annular filter part is achieved, the automation degree of the structure is increased, and the cleaning efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas denitration, in particular to a flue gas denitration device. Background Art

[0002] Flue gas denitrification technology refers to the technology of removing nitrogen oxides from flue gas by using appropriate equipment, materials and processes. Common flue gas denitrification technologies include selective catalytic reduction (SCR), selective non-catalytic reduction (SNCR), absorbent method, oxidant method and catalytic oxidation method. The main principle of flue gas denitrification technology is to reduce NOx to nitrogen and water by adding appropriate reducing agents or catalysts during the combustion process or flue gas treatment system, thereby achieving the purpose of reducing NOx emissions. SCR technology injects ammonia or urea into the flue gas, and reacts with NOx under the action of catalysts to generate harmless nitrogen and water vapor; SNCR technology directly sprays ammonia or urea into high-temperature flue gas to react with NOx in a non-selective catalytic reduction reaction. Compared with other denitrification technologies, SCR technology is efficient, reliable and stable. It can denitrify in a wide temperature range. Under ideal conditions, it can achieve a removal efficiency of more than 90%, and the effect is stable and is not affected by changes in flue gas temperature and composition. Therefore, SCR technology is particularly suitable for occasions that need to meet strict emission standards, such as thermal power plants.

[0003] Before the flue gas denitrification device performs denitrification, it is necessary to filter the flue gas to remove large particles of impurities in the flue gas to avoid the problem that the impurities easily cause internal blockage of subsequent components. This requires the filter structure to be frequently disassembled and cleaned during the maintenance of the denitrification device. Currently, the disassembly and cleaning are mostly done manually, which is inefficient and consumes a lot of manpower. To this end, we propose a flue gas denitrification device. Summary of the invention

[0004] The object of the present invention is to provide a flue gas denitrification device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a flue gas denitrification device, comprising a supporting base, a flue gas pretreatment mechanism is arranged on the top of the supporting base, a flue gas denitrification mechanism is arranged on the top of the supporting base and is located on the right side of the flue gas pretreatment mechanism, and a denitrification agent storage mechanism is arranged on the top of the supporting base and is located on the right side of the flue gas denitrification mechanism.

[0006] The flue gas pretreatment mechanism includes a support platform, which is fixedly installed on the top of the support base, a fixed air inlet cylinder is fixedly installed on the inner wall of the support platform, a rubber sealing ring is fixedly connected to the top of the fixed air inlet cylinder, a movable filter cartridge is movably connected to the top of the rubber sealing ring, a support ring is fixedly installed on the inner wall of the movable filter cartridge, an annular filter element is fixedly connected to the top of the support ring, a top plate is fixedly installed on the top of the annular filter element, a rotating rod is rotatably connected to the top of the top plate, blades are fixedly installed on the outer wall of the rotating rod, a multi-way square tube is fixedly connected to the top of the movable filter cartridge, a No. 2 solenoid valve is fixedly connected to the right side of the multi-way square tube, and a No. 2 hose is fixedly connected to the right side of the No. 2 solenoid valve.

[0007] Preferably, the bottom of the top plate is rotatably connected to a rotating plate, the top of the rotating plate is fixedly connected to the bottom of the rotating rod, a connecting bent rod is fixedly installed on the bottom of the top plate, the end of the connecting bent rod away from the rotating plate is fixedly connected to a vertical bar, and the side of the vertical bar close to the inner wall of the annular filter is fixedly connected to a brush.

[0008] Preferably, a support rod located above the rotating rod is fixedly installed on the inner wall of the movable filter cartridge, one end of the support rod away from the inner wall of the movable filter cartridge is fixedly connected to a center block, a sliding fin is slidably connected to the inner wall of the center block, and an elastic member is fixedly installed on the bottom of the center block.

[0009] Preferably, a fitting block is fixedly installed at the bottom of the sliding fin, the top of the fitting block is fixedly connected to the bottom of the elastic member, the bottom of the fitting block is movably connected to the top of the rotating rod, a strip groove is provided on the side of the fitting block close to the bottom, and an annular groove is provided at the bottom of the fitting block.

[0010] Preferably, an L-shaped plate is fixedly installed on the front of the support platform, a cylinder is fixedly installed on the front of the L-shaped plate, a limiting rod is slidably connected to the inner wall of the L-shaped plate, the output shaft of the cylinder extends to the back of the L-shaped plate and is fixedly connected to the front of the movable filter cartridge, and the end of the limiting rod is fixedly connected to the front of the movable filter cartridge.

[0011] Preferably, a No. 1 solenoid valve is fixedly connected to the top of the multi-way square tube, a No. 1 hose is fixedly connected to the top of the No. 1 solenoid valve, and one end of the No. 1 hose away from the No. 1 solenoid valve is fixedly connected to an external air source.

[0012] Preferably, the flue gas denitrification mechanism includes a lifting frame, which is fixedly installed on the top of the supporting base, and a denitrification bin is fixedly installed on the inner wall of the lifting frame. The end of the No. 2 hose away from the No. 2 solenoid valve is fixedly connected to the left side of the denitrification bin, the top of the denitrification bin is fixedly connected with an exhaust pipe port, and the bottom of the denitrification bin is fixedly connected with a sewage valve.

[0013] Preferably, an inner partition is fixedly installed on the inner wall of the denitrification bin, a conical cylinder is fixedly connected to the bottom of the inner partition, a bracket is fixedly installed at the center of the top of the inner partition, an annular pipe is fixedly installed on the outer wall of the bracket, an atomizing nozzle is fixedly connected to the bottom of the annular pipe, a branch pipe is fixedly connected to the right side of the bracket, the right side of the branch pipe extends to the side of the denitrification bin and is fixedly connected to a strip pipe.

[0014] Preferably, the denitrification agent storage mechanism includes a supporting leg, wherein the supporting leg is fixedly mounted on the top of the supporting base, a liquid storage tank is fixedly mounted on the top of the supporting leg, a liquid adding nozzle is fixedly connected to the top of the liquid storage tank, a driving motor is fixedly mounted on the top of the liquid storage tank, an output shaft of the driving motor extends into the inner cavity of the liquid storage tank and is fixedly connected to a rotating shaft, a stirring paddle is fixedly mounted on the outer wall of the rotating shaft, an extraction pump is fixedly mounted on the side of the liquid storage tank, an output pipe of the extraction pump is fixedly connected to the outer wall of the strip pipe, an input end of the extraction pump is fixedly connected to a ring pipe, and a branch extraction pipe is fixedly connected to the inner wall of the ring pipe.

[0015] Preferably, one end of the branch extraction tube away from the ring tube extends into the inner cavity of the liquid storage tank and is fixedly connected to a hollow part, a through groove is provided on the inclined surface of the hollow part, and a filter is fixedly installed on the inner wall of the through groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] Through the overall design of the flue gas pretreatment mechanism, the present invention can automatically disconnect the movable filter cartridge from the fixed air inlet cartridge, and then use the external air source to reversely inflate and clean the annular filter element. At the same time, the power of the air source drives the brush to rotate to brush and clean the inner wall of the annular filter element, thereby realizing the function of automatically and fully cleaning the annular filter element, increasing the degree of automation of the structure, and improving the cleaning efficiency. Through the overall design of the denitrification agent storage mechanism, the denitrification agent can be stored and continuously mixed to avoid the problem of precipitation of the denitrification agent during storage, which in turn affects the denitrification effect of the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the separation structure of the fixed air inlet cylinder and the movable filter cylinder of the present invention;

[0020] Figure 3 It is a schematic diagram of the cutaway structure of the movable filter cartridge of the present invention;

[0021] Figure 4 for Figure 3A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 5 It is a schematic diagram of the bottom structure of the bonding block of the present invention;

[0023] Figure 6 It is a schematic diagram of the bottom structure of the top plate of the present invention;

[0024] Figure 7 It is a schematic diagram of the cutaway structure of the denitration bin of the present invention;

[0025] Figure 8 It is a schematic diagram of the bottom structure of the annular pipeline of the present invention;

[0026] Fig. 9 It is a schematic diagram of the cutaway structure of the liquid storage tank of the present invention;

[0027] Fig.10 for Fig. 9 Schematic diagram of the enlarged structure at point B in the middle.

[0028] In the figure: 1, support base; 2, flue gas pretreatment mechanism; 21, support platform; 22, fixed air inlet cylinder; 23, movable filter cartridge; 231, support ring; 232, annular filter element; 233, top plate; 2331, rotating sheet; 2332, connecting bent rod; 2333, vertical bar; 2334, brush; 234, rotating rod; 235, blade; 236, support rod; 237, median block; 238, elastic member; 239, sliding fin plate; 2391, fitting block; 2392, strip groove; 2393, annular groove; 24, rubber sealing ring; 25, multi-way square tube; 251, No. 1 solenoid valve; 252, No. 1 soft pipe; 26, No. 2 solenoid valve; 261, No. 2 hose; 27, L-shaped plate; 28, cylinder; 29, limit rod; 3, flue gas denitrification mechanism; 31, lifting frame; 32, denitrification bin; 33, exhaust pipe outlet; 34, inner partition; 35, cone cylinder; 36, branch pipe; 37, strip pipe; 38, bracket; 381, ring pipe; 382, ​​atomizing nozzle; 4, denitrification agent storage mechanism; 41, supporting leg; 42, liquid storage tank; 43, liquid adding pipe outlet; 44, driving motor; 45, rotating shaft; 46, stirring paddle; 47, branch extraction pipe; 471, hollow part; 472, filter; 48, ring pipe; 49, extraction pump. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 10 The present invention provides a technical solution: a flue gas denitrification device, comprising a supporting base 1, a flue gas pretreatment mechanism 2 is arranged on the top of the supporting base 1, a flue gas denitrification mechanism 3 is arranged on the top of the supporting base 1 and is located on the right side of the flue gas pretreatment mechanism 2, and a denitrification agent storage mechanism 4 is arranged on the top of the supporting base 1 and is located on the right side of the flue gas denitrification mechanism 3.

[0031] In the preferred technical solution of the present embodiment, the flue gas pretreatment mechanism 2 includes a support platform 21, the support platform 21 is fixedly installed on the top of the support base 1, a fixed air inlet cylinder 22 is fixedly installed on the inner wall of the support platform 21, a rubber sealing ring 24 is fixedly connected to the top of the fixed air inlet cylinder 22, a movable filter cartridge 23 is movably connected to the top of the rubber sealing ring 24, a support ring 231 is fixedly installed on the inner wall of the movable filter cartridge 23, an annular filter element 232 is fixedly connected to the top of the support ring 231, a top plate 233 is fixedly installed on the top of the annular filter element 232, a rotating rod 234 is rotatably connected to the top of the top plate 233, a blade 235 is fixedly installed on the outer wall of the rotating rod 234, and a plurality of movable filter cartridges 23 are fixedly connected to the top of the movable filter cartridge 23. The right side of the multi-way square tube 25 is fixedly connected with the second solenoid valve 26, the right side of the second solenoid valve 26 is fixedly connected with the second hose 261, the bottom of the top plate 233 is rotatably connected with the rotating piece 2331, the top of the rotating piece 2331 is fixedly connected to the bottom of the rotating rod 234, the bottom of the top plate 233 is fixedly installed with a connecting bent rod 2332, the end of the connecting bent rod 2332 away from the rotating piece 2331 is fixedly connected with a vertical bar 2333, and the side of the vertical bar 2333 close to the inner wall of the annular filter 232 is fixedly connected with a brush 2334, the front of the support platform 21 is fixedly installed with an L-shaped plate 27, the front of the L-shaped plate 27 is fixedly installed with a cylinder 28, and the inner wall of the L-shaped plate 27 is slidably connected with a limiting rod 29, the output shaft of the cylinder 28 extends to the back of the L-shaped plate 27 and is fixedly connected to the front of the movable filter cartridge 23, the end of the limit rod 29 is fixedly connected to the front of the movable filter cartridge 23, the top of the multi-way square tube 25 is fixedly connected to a No. 1 solenoid valve 251, the top of the No. 1 solenoid valve 251 is fixedly connected to a No. 1 hose 252, the end of the No. 1 hose 252 away from the No. 1 solenoid valve 251 is fixedly connected to an external air source, the exhaust gas output pipe is pre-connected to the bottom of the fixed air inlet cylinder 22, the No. 1 solenoid valve 251 is closed and the No. 2 solenoid valve 26 is opened, so that the exhaust gas flows through the inner cavity of the movable filter cartridge 23, and the annular filter element 232 filters the exhaust gas, and the filtered exhaust gas then enters the denitration bin 32 for denitration. When cleaning the filter surface of the annular filter element 232, the control cylinder 28 is extended to make the movable filter cartridge 23 move backward and disconnect from the fixed air inlet cylinder 22, and then the No. 2 solenoid valve 26 is closed, and the No. 1 solenoid valve 251 is opened, and the external air source flows into the movable filter cartridge 23 to reversely inflate and clean the annular filter element 232. The flow of gas can drive the blade 235 to rotate, and the rotating piece 2331 is rotated through the transmission of the rotating rod 234 and the top plate 233, and then the rotating brush 2334 is used to brush and clean the inner wall of the annular filter element 232 to improve the adequacy of self-cleaning. Through the design of the rubber sealing ring 24, the connection between the movable filter cartridge 23 and the fixed air inlet cylinder 22 can be actively sealed.

[0032] In the preferred technical solution of the present embodiment, a support rod 236 located above the rotating rod 234 is fixedly installed on the inner wall of the movable filter cartridge 23, and one end of the support rod 236 away from the inner wall of the movable filter cartridge 23 is fixedly connected to a center block 237, and a sliding fin plate 239 is slidably connected to the inner wall of the center block 237, and an elastic member 238 is fixedly installed on the bottom of the center block 237, and a fitting block 2391 is fixedly installed on the bottom of the sliding fin plate 239, and the top of the fitting block 2391 is fixedly connected to the bottom of the elastic member 238, and the bottom of the fitting block 2391 is movably connected to the top of the rotating rod 234, and a strip groove 2392 is provided on the side of the fitting block 2391 near the bottom, An annular groove 2393 is provided at the bottom. When filtering through the annular filter element 232, the initial elastic force of the elastic element 238 can apply downward pressure to the fitting block 2391, and the static friction between the fitting block 2391 and the top of the rotating rod 234 completes the locking of the position of the blade 235. When the annular filter element 232 is reversely flushed, the downwardly flowing gas can apply downward pressure to the blade 235 and the rotating rod 234 at the same time. The rotating rod 234 is an existing elastic rod that can be vertically extended and retracted. The downward pressure can cause the top of the rotating rod 234 to shrink downward for a distance, thereby releasing the static friction between the fitting block 2391 and the rotating rod 234, so that the blade 235 can rotate smoothly.

[0033] In the preferred technical solution of this embodiment, the flue gas denitrification mechanism 3 includes a lifting frame 31, which is fixedly installed on the top of the supporting base 1, and a denitrification bin 32 is fixedly installed on the inner wall of the lifting frame 31. The end of the No. 2 hose 261 away from the No. 2 solenoid valve 26 is fixedly connected to the left side of the denitrification bin 32, and the top of the denitrification bin 32 is fixedly connected with an exhaust pipe port 33, and the bottom of the denitrification bin 32 is fixedly connected with a sewage valve, and an inner partition 34 is fixedly installed on the inner wall of the denitrification bin 32, and a conical cylinder 35 is fixedly connected to the bottom of the inner partition 34, and a bracket 38 is fixedly installed at the center of the top of the inner partition 34. The bracket 3 An annular pipe 381 is fixedly installed on the outer wall of 8, and an atomizing nozzle 382 is fixedly connected to the bottom of the annular pipe 381. A branch pipe 36 is fixedly connected to the right side of the bracket 38. The right side of the branch pipe 36 extends to the side of the denitrification bin 32 and is fixedly connected to a strip pipe 37. After the extraction pump 49 is running, the denitrification agent can be transported to the inner cavity of the strip pipe 37. The denitrification agent then passes through the branch pipe 36 into the annular pipe 381, and then is output in a conical range from the bottom of the atomizing nozzle 382. Through the guidance of the conical cylinder 35, the flue gas can move through the conical range, thereby improving the contact effect between the denitrification agent and the flue gas.

[0034] In the preferred technical solution of the present embodiment, the denitrification agent storage mechanism 4 includes a support leg 41, the support leg 41 is fixedly mounted on the top of the support base 1, a liquid storage tank 42 is fixedly mounted on the top of the support leg 41, a liquid adding nozzle 43 is fixedly connected to the top of the liquid storage tank 42, a drive motor 44 is fixedly mounted on the top of the liquid storage tank 42, the output shaft of the drive motor 44 extends into the inner cavity of the liquid storage tank 42 and is fixedly connected to a rotating shaft 45, a stirring paddle 46 is fixedly mounted on the outer wall of the rotating shaft 45, an extraction pump 49 is fixedly mounted on the side of the liquid storage tank 42, the output pipe of the extraction pump 49 is fixedly connected to the outer wall of the strip tube 37, the input end of the extraction pump 49 is fixedly connected to a ring pipe 48, a branch extraction pipe 47 is fixedly connected to the inner wall of the ring pipe 48, and the branch extraction pipe 47 extends to the liquid storage tank at one end away from the ring pipe 48. A hollow part 471 is fixedly connected to the inner cavity of the liquid storage tank 42, and a through groove is opened on the inclined surface of the hollow part 471. A filter screen 472 is fixedly installed on the inner wall of the through groove. The denitrifier can be added to the inner cavity of the liquid storage tank 42 from the liquid adding pipe mouth 43. The driving motor 44 can be controlled to work and the stirring paddle 46 can be driven by the transmission of the rotating shaft 45 to rotate, so as to mix the denitrifier and avoid the problem of precipitation of the denitrifier during storage, so as to ensure the effect of flue gas denitrification. Through the position design of the annular pipe 48 and the branch extraction pipe 47, the denitrifier can be extracted from different positions in the inner cavity of the liquid storage tank 42 when the extraction pump 49 is running, so as to increase the uniformity of the extraction of the denitrifier. Through the design of the filter screen 472, the denitrifier extracted by the extraction pump 49 can be filtered to avoid the problem that precipitation can easily lead to internal blockage of subsequent components.

[0035] Working principle: When in use, add denitrification agent into the inner cavity of the liquid storage tank 42 from the liquid adding pipe port 43, connect the exhaust gas output pipe to the bottom of the fixed air inlet cylinder 22 in advance, close the No. 1 solenoid valve 251 and open the No. 2 solenoid valve 26, so that the exhaust gas flows through the inner cavity of the movable filter cartridge 23, and the annular filter element 232 filters the exhaust gas. The filtered exhaust gas then enters the denitrification bin 32, and the extraction pump 49 is controlled to operate to extract the denitrification agent in the liquid storage tank 42 and send it to the air inlet cylinder 22. The denitrification agent is transported in the pipe 37 and then output from the bottom of the atomizing nozzle 382, ​​making full contact with the flue gas to realize the function of flue gas denitrification. If it is necessary to clean the filter surface of the annular filter element 232, the control cylinder 28 is extended to make the movable filter cartridge 23 move backward and disconnect from the fixed air inlet cylinder 22, and then the No. 2 solenoid valve 26 is closed and the No. 1 solenoid valve 251 is opened, and the external air source then flows into the movable filter cartridge 23 to reversely inflate and clean the annular filter element 232.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flue gas denitrification device, comprising a support base (1), characterized in that: A flue gas pretreatment mechanism (2) is arranged on the top of the support base (1), a flue gas denitration mechanism (3) is arranged on the top of the support base (1) and is located on the right side of the flue gas pretreatment mechanism (2), and a denitration agent storage mechanism (4) is arranged on the top of the support base (1) and is located on the right side of the flue gas denitration mechanism (3); The flue gas pretreatment mechanism (2) comprises a support platform (21), the support platform (21) is fixedly mounted on the top of the support base (1), a fixed air inlet cylinder (22) is fixedly mounted on the inner wall of the support platform (21), a rubber sealing ring (24) is fixedly connected to the top of the fixed air inlet cylinder (22), a movable filter cartridge (23) is movably connected to the top of the rubber sealing ring (24), a support ring (231) is fixedly mounted on the inner wall of the movable filter cartridge (23), and the top of the support ring (231) is fixedly mounted on the inner wall of the movable filter cartridge (23). An annular filter element (232) is connected, a top plate (233) is fixedly installed on the top of the annular filter element (232), a rotating rod (234) is rotatably connected to the top of the top plate (233), a blade (235) is fixedly installed on the outer wall of the rotating rod (234), a multi-way square tube (25) is fixedly connected to the top of the movable filter cartridge (23), a No. 2 solenoid valve (26) is fixedly connected to the right side of the multi-way square tube (25), and a No. 2 hose (261) is fixedly connected to the right side of the No. 2 solenoid valve (26).

2. A flue gas denitration device according to claim 1, characterized in that: The bottom of the top plate (233) is rotatably connected to a rotating plate (2331), the top of the rotating plate (2331) is fixedly connected to the bottom of the rotating rod (234), the bottom of the top plate (233) is fixedly installed with a connecting bent rod (2332), one end of the connecting bent rod (2332) away from the rotating plate (2331) is fixedly connected to a vertical bar (2333), and the side of the vertical bar (2333) close to the inner wall of the annular filter (232) is fixedly connected to a brush (2334).

3. A flue gas denitrification device according to claim 1, characterized in that: A support rod (236) located above the rotating rod (234) is fixedly mounted on the inner wall of the movable filter cartridge (23); one end of the support rod (236) away from the inner wall of the movable filter cartridge (23) is fixedly connected to a center block (237); a sliding fin plate (239) is slidably connected to the inner wall of the center block (237); and an elastic member (238) is fixedly mounted on the bottom of the center block (237).

4. A flue gas denitration device according to claim 3, characterized in that: A fitting block (2391) is fixedly installed at the bottom of the sliding fin (239), the top of the fitting block (2391) is fixedly connected to the bottom of the elastic member (238), the bottom of the fitting block (2391) is movably connected to the top of the rotating rod (234), a strip groove (2392) is provided on the side of the fitting block (2391) close to the bottom, and an annular groove (2393) is provided at the bottom of the fitting block (2391).

5. A flue gas denitration device according to claim 1, characterized in that: An L-shaped plate (27) is fixedly mounted on the front of the support platform (21), a cylinder (28) is fixedly mounted on the front of the L-shaped plate (27), a limiting rod (29) is slidably connected to the inner wall of the L-shaped plate (27), an output shaft of the cylinder (28) extends to the back of the L-shaped plate (27) and is fixedly connected to the front of the movable filter cartridge (23), and an end of the limiting rod (29) is fixedly connected to the front of the movable filter cartridge (23).

6. A flue gas denitration device according to claim 1, characterized in that: A first solenoid valve (251) is fixedly connected to the top of the multi-way square tube (25), a first hose (252) is fixedly connected to the top of the first solenoid valve (251), and one end of the first hose (252) away from the first solenoid valve (251) is fixedly connected to an external air source.

7. A flue gas denitration device according to claim 1, characterized in that: The flue gas denitrification mechanism (3) comprises a lifting frame (31), the lifting frame (31) is fixedly mounted on the top of the supporting base (1), a denitrification bin (32) is fixedly mounted on the inner wall of the lifting frame (31), one end of the No. 2 hose (261) away from the No. 2 solenoid valve (26) is fixedly connected to the left side of the denitrification bin (32), the top of the denitrification bin (32) is fixedly connected to an exhaust pipe port (33), and the bottom of the denitrification bin (32) is fixedly connected to a sewage valve.

8. A flue gas denitration device according to claim 7, characterized in that: An inner baffle (34) is fixedly mounted on the inner wall of the denitration bin (32), a conical cylinder (35) is fixedly connected to the bottom of the inner baffle (34), a bracket (38) is fixedly mounted at the center of the top of the inner baffle (34), an annular pipe (381) is fixedly mounted on the outer wall of the bracket (38), an atomizing nozzle (382) is fixedly connected to the bottom of the annular pipe (381), a branch pipe (36) is fixedly connected to the right side of the bracket (38), and the right side of the branch pipe (36) extends to the side of the denitration bin (32) and is fixedly connected to a strip pipe (37).

9. A flue gas denitration device according to claim 8, characterized in that: The denitrification agent storage mechanism (4) comprises a support leg (41), wherein the support leg (41) is fixedly mounted on the top of the support base (1), a liquid storage tank (42) is fixedly mounted on the top of the support leg (41), a liquid adding nozzle (43) is fixedly connected to the top of the liquid storage tank (42), a drive motor (44) is fixedly mounted on the top of the liquid storage tank (42), an output shaft of the drive motor (44) extends into the inner cavity of the liquid storage tank (42) and is fixedly connected to a rotating shaft (45), a stirring paddle (46) is fixedly mounted on the outer wall of the rotating shaft (45), an extraction pump (49) is fixedly mounted on the side of the liquid storage tank (42), an output pipe of the extraction pump (49) is fixedly connected to the outer wall of the strip tube (37), an input end of the extraction pump (49) is fixedly connected to a ring tube (48), and a branch extraction pipe (47) is fixedly connected to the inner wall of the ring tube (48).

10. A flue gas denitration device according to claim 9, characterized in that: One end of the branch extraction pipe (47) away from the ring pipe (48) extends into the inner cavity of the liquid storage tank (42) and is fixedly connected to a hollow part (471). A through groove is provided on the inclined surface of the hollow part (471), and a filter screen (472) is fixedly installed on the inner wall of the through groove.

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