Flue gas denitration pipeline anti-blocking device with automatic cleaning function

Abstract

The invention belongs to the technical field of pipeline anti-blocking, and discloses a flue gas denitration pipeline anti-blocking device with an automatic cleaning function, the flue gas denitration pipeline anti-blocking device comprises a first conveying pipeline, the top end of the first conveying pipeline is communicated with an induced air pipeline, an anti-blocking filtering mechanism is installed in a flame arrester shell, and through cooperation of structures such as a servo motor, a gear and a limiting disc, the anti-blocking filtering mechanism can be used for filtering the flue gas denitration pipeline. The device can clean dust impurities in ammonia gas blocked in the flame arrester shell, a servo motor is started to drive a gear to rotate, and a limiting disc, a connecting rod, a first flame arrester inner core filter plate and a second flame arrester inner core filter plate are driven to rotate, so that impurities filtered in the flame arrester shell fall off, and the dust impurities in the ammonia gas blocked in the flame arrester shell are removed. And when ammonia gas passes through the interior of the flame arrester shell, the whole transmission disc is driven to rotate through the shape of a transmission blade, the cleaning rod is driven to rotate, the cleaning rod rotates to clean the surface of a second flame arrester inner core filter plate, and therefore the purpose of conveniently cleaning impurities blocked in the flame arrester shell to prevent blockage is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline anti-blocking, and in particular is a flue gas denitration pipeline anti-blocking device with an automatic cleaning function. Background Art

[0002] The SCR flue gas denitrification system is a system that uses the selective catalytic reduction (SCR) method to denitrify flue gas. SCR flue gas denitrification technology refers to the technology that in the presence of catalysts and oxygen, within a relatively low temperature range (usually within 310-420°C), the reducing agent (usually ammonia) selectively reduces NOx in the flue gas to generate N2 and water to reduce NOx emissions.

[0003] Since ammonia contains a small amount of water vapor and other dust impurities, and the temperature of ammonia is relatively low, there is a risk of blockage in the SCR area of ​​the plant, especially in winter when the temperature is low. The main blockage points are at the ammonia injection valve and flame arrester. After the blockage, manual cleaning is required, which takes a long time and is accompanied by the risk of ammonia poisoning.

[0004] It is necessary to solve the problem of dust impurities blocking the flame arrester in this area of ​​the factory to ensure the normal transportation of the flame arrester, and the impurities in the flame arrester need to be purified and removed for treatment. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a flue gas denitrification pipeline anti-blocking device with automatic cleaning function.

[0006] To achieve the above object, the present invention provides the following technical solution: a flue gas denitrification pipeline anti-blocking device with automatic cleaning function, comprising a first delivery pipeline, the top end of the first delivery pipeline is connected to an induced draft pipeline, an opening and closing mechanism is arranged outside the first delivery pipeline, a second delivery pipeline is arranged outside the opening and closing mechanism, one end of the second delivery pipeline is connected to a flame arrester housing, and an anti-blocking filtering mechanism is installed inside the flame arrester housing;

[0007] The anti-blocking filtering mechanism includes a servo motor, a gear and a limit plate, the servo motor is fixed on the top of the flame arrester housing, the bottom of the servo motor is fixed with a gear, the flame arrester housing is internally rotatably connected to the limit plate, a connecting rod is fixed on one side of the limit plate, a first flame arrester inner core filter plate is fixed on the outer wall of the connecting rod, a first soft comb tooth is fixed on the outside of the first flame arrester inner core filter plate, a first through hole is provided at one end of the first flame arrester inner core filter plate, a second flame arrester inner core filter plate is fixed on the outside of the connecting rod, a second soft comb tooth is fixed on the outside of the second flame arrester inner core filter plate, a second through hole is provided on the outside of the second flame arrester inner core filter plate, a third flame arrester inner core filter plate is sleeved on the outside of the connecting rod, a third soft comb tooth is fixed on the outside of the third flame arrester inner core filter plate, and a third through hole is provided on the outside of the third flame arrester inner core filter plate.

[0008] Preferably, a transmission disc is sleeved on the outside of the connecting rod, a fourth through hole is opened on the outside of the transmission disc, transmission blades are fixed on the outside of the transmission disc, and a cleaning rod is fixed on the outside of the transmission disc.

[0009] Preferably, the outer wall of the gear is provided with several groups of teeth, and the teeth are distributed at equal intervals about the central axis of the gear. The diameter of the limit plate is equal to the diameter inside the flame arrester housing. Two groups of limit plates are provided, and the limit plates are symmetrically distributed about the central axis of the connecting rod.

[0010] Preferably, the outer wall of the first flame arrester inner core filter plate is provided with several groups of teeth, and the teeth are evenly spaced about the central axis of the first flame arrester inner core filter plate, the first soft comb teeth are provided with several groups, and the first soft comb teeth are evenly spaced about the central axis of the first flame arrester inner core filter plate, and the first through holes are opened with several groups, and the first through holes are evenly spaced about the central axis of the first flame arrester inner core filter plate.

[0011] Preferably, the second soft comb teeth are arranged in several groups, and the second soft comb teeth are evenly spaced about the central axis of the second flame arrester inner core filter plate; the second through holes are opened in several groups, and the second through holes are evenly spaced about the central axis of the second flame arrester inner core filter plate.

[0012] Preferably, the outer wall of the third flame arrester inner core filter plate is provided with several groups of teeth, and the teeth are evenly spaced about the central axis of the third flame arrester inner core filter plate, the third soft comb teeth are provided with several groups, and the third soft comb teeth are evenly spaced about the central axis of the third flame arrester inner core filter plate, and the third through holes are opened with several groups, and the third through holes are evenly spaced about the central axis of the third flame arrester inner core filter plate.

[0013] Preferably, the fourth through holes are opened in a plurality of groups and are distributed at equal intervals about the central axis of the transmission disk, and the transmission blades are fixed in a plurality of groups and are distributed at equal intervals about the central axis of the transmission disk.

[0014] Preferably, the transmission disc is rotatably connected to the outside of the connecting rod, and a plurality of groups of cleaning rods are provided, and the cleaning rods are distributed at equal intervals about the central axis of the transmission disc.

[0015] Preferably, the opening and closing mechanism includes an ammonia injection regulating valve, a manual switch and a differential pressure detection device. The ammonia injection regulating valve is connected to one end of the first conveying pipeline, a manual switch is installed at the top of the ammonia injection regulating valve, a differential pressure detection device is provided at the bottom of the ammonia injection regulating valve, and the output end of the ammonia injection regulating valve is connected to the second conveying pipeline.

[0016] Preferably, the bottom end of the flame arrester housing is connected to a drain pipe, one end of the drain pipe is connected to a water supply main pipe, the bottom end of the drain pipe is connected to a third delivery pipe, the bottom end of the third delivery pipe is connected to a fixed drainage pit, a plurality of groups of purification filter elements are arranged inside the fixed drainage pit and are distributed at equal intervals, the inside of the fixed drainage pit is connected to a drainage pipe, and a wastewater pump is installed at the top of the drainage pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention arranges the coordination of structures such as servo motor, gear, limit plate, etc., so that the device can clean the dust impurities in the ammonia gas blocked in the flame arrester housing. The servo motor is started to drive the gear to rotate, so that the gear drives the first flame arrester inner core filter plate and the third flame arrester inner core filter plate through its own shape and is connected through the teeth meshing fixed on the first flame arrester inner core filter plate and the third flame arrester inner core filter plate, thereby driving the limit plate, the connecting rod, the first flame arrester inner core filter plate, the second flame arrester inner core filter plate to rotate, and driving the third flame arrester inner core filter plate to rotate in the opposite direction, so that the impurities filtered in the flame arrester housing are fallen off, and the ammonia gas drives the transmission disk as a whole to rotate through the shape of the transmission blade when passing through the interior of the flame arrester housing, thereby driving the cleaning rod to rotate, so that the cleaning rod rotates to clean the surface of the second flame arrester inner core filter plate, thereby achieving the purpose of facilitating the cleaning and preventing impurities blocked in the flame arrester housing.

[0019] The present invention cooperates with the arrangement of a sewage pipe, a third conveying pipe, and a fixed drainage pit structure so that when the device cleans impurities inside the flame arrester housing, the impurities fall into the sewage pipe and enter the fixed drainage pit through the third conveying pipe. After the impurities are purified by the purification filter element inside the fixed drainage pit, the wastewater pump is started, and the wastewater pump draws the purified impurities inside the fixed drainage pit into the wastewater pool through the drainage pipe for unified treatment, thereby achieving the purpose of purifying and cleaning the impurities hung by the device.

[0020] The present invention cooperates with structures such as an ammonia spray regulating valve, a manual switch, and a differential pressure detection device so that the device can introduce high-temperature flue gas with a temperature of 120-140°C from the induced draft duct. When the duct is blocked, the ammonia spray regulating valve is opened by the manual switch so that the high-temperature flue gas is introduced into the interior of the ammonia spray regulating valve to melt the ice crystals. A differential pressure detection device is provided, which can monitor the data and introduce the data into the monitoring panel in the control room. A large differential pressure alarm is provided so that the monitoring personnel can monitor the duct blockage at the first time and deal with it in time, thereby achieving the purpose of facilitating the introduction of hot flue gas into the duct and melting the ice. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0023] Figure 3 It is a front cross-sectional structural schematic diagram of the present invention;

[0024] Figure 4 It is a schematic diagram of the anti-clogging filtering mechanism structure of the present invention;

[0025] Figure 5 It is a schematic diagram of the back structure of the anti-blocking filtering mechanism of the present invention;

[0026] Figure 6 It is a schematic diagram of the explosion structure of the anti-blocking filtering mechanism of the present invention;

[0027] Figure 7 It is a schematic diagram of the explosion right view of the anti-blocking filtering mechanism of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the opening and closing mechanism of the present invention.

[0029] In the figure: 1, first conveying pipeline; 2, induced draft pipeline; 3, opening and closing mechanism; 301, ammonia spraying valve; 302, manual switch; 303, differential pressure detection device; 4, second conveying pipeline; 5, flame arrester housing; 6, anti-blocking filtering mechanism; 601, servo motor; 602, gear; 603, limit plate; 604, connecting rod; 605, first flame arrester inner core filter plate; 606, first soft comb teeth; 607, first through hole; 608, The second flame arrester inner core filter plate; 609, the second soft comb teeth; 610, the second through hole; 611, the third flame arrester inner core filter plate; 612, the third soft comb teeth; 613, the third through hole; 614, the transmission plate; 615, the fourth through hole; 616, the transmission blade; 617, the cleaning rod; 7, the sewage pipe; 8, the water supply mother pipe; 9, the third delivery pipeline; 10, the drainage pipeline; 11, the wastewater pump; 12, the fixed drainage pit; 13, the purification filter element. DETAILED DESCRIPTION

[0030] 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.

[0031] like Figures 1 to 8 As shown, the present invention provides a flue gas denitrification pipeline anti-blocking device with an automatic cleaning function, comprising a first conveying pipeline 1, the top of the first conveying pipeline 1 is connected with an induced draft pipeline 2, an opening and closing mechanism 3 is arranged outside the first conveying pipeline 1, a second conveying pipeline 4 is arranged outside the opening and closing mechanism 3, one end of the second conveying pipeline 4 is connected with a flame arrester shell 5, an anti-blocking filtering mechanism 6 is installed inside the flame arrester shell 5, the bottom end of the flame arrester shell 5 is connected with a sewage pipe 7, one end of the sewage pipe 7 is connected with a water supply mother pipe 8, the bottom end of the sewage pipe 7 is connected with a third conveying pipeline 9, the bottom end of the third conveying pipeline 9 is connected with a fixed drainage pit 12, a plurality of groups of purification filter elements 13 are arranged inside the fixed drainage pit 12 and are distributed at equal intervals, the inside of the fixed drainage pit 12 is connected with a drainage pipe 10, and a wastewater pump 11 is installed at the top of the drainage pipe 10.

[0032] The above scheme is adopted: impurities fall into the sewage pipe 7 and enter the interior of the fixed discharge pit 12 through the third conveying pipe 9. After the impurities are purified by the purification filter element 13 inside the fixed discharge pit 12, the wastewater pump 11 is started, and the wastewater pump 11 pumps the purified impurities inside the fixed discharge pit 12 into the wastewater pool through the drainage pipe 10 for unified treatment.

[0033] like Figures 1 to 8As shown, the opening and closing mechanism 3 includes an ammonia injection regulating valve 301, a manual switch 302 and a differential pressure detection device 303. The ammonia injection regulating valve 301 is connected to one end of the first conveying pipeline 1. The manual switch 302 is installed at the top of the ammonia injection regulating valve 301, and the differential pressure detection device 303 is arranged at the bottom of the ammonia injection regulating valve 301. The output end of the ammonia injection regulating valve 301 is connected to the second conveying pipeline 4.

[0034] The above scheme is adopted: by introducing high-temperature flue gas with a temperature of 120-140°C from the induced draft duct 2, when the pipeline is blocked, the ammonia spray regulating valve 301 is opened by the manual switch 302, so that the high-temperature flue gas is introduced into the interior of the ammonia spray regulating valve 301 to melt the ice crystals, and by setting a differential pressure detection device 303, the differential pressure detection device 303 can monitor the data and introduce the data into the monitoring panel in the control room, and set a large differential pressure alarm, so that the monitoring personnel can monitor the pipeline blockage at the first time and deal with it in time.

[0035] like Figures 1 to 8 As shown, the anti-blocking filtering mechanism 6 includes a servo motor 601, a gear 602 and a limit plate 603. The servo motor 601 is fixed at the top of the flame arrester housing 5, and the gear 602 is fixed to the bottom of the servo motor 601. The internal rotation of the flame arrester housing 5 is connected to the limit plate 603. A connecting rod 604 is fixed to one side of the limit plate 603. The outer wall of the gear 602 is provided with a plurality of groups of teeth, and the teeth are evenly spaced about the central axis of the gear 602. The diameter of the limit plate 603 is equal to the diameter of the inside of the flame arrester housing 5. Two groups of limit plates 603 are provided, and the limit plates 603 are symmetrically distributed about the central axis of the connecting rod 604.

[0036] like Figures 1 to 8 As shown, a first flame arrester inner core filter plate 605 is fixed to the outer wall of the connecting rod 604, a first soft comb tooth 606 is fixed to the outside of the first flame arrester inner core filter plate 605, a first through hole 607 is opened at one end of the first flame arrester inner core filter plate 605, a plurality of groups of teeth are arranged on the outer wall of the first flame arrester inner core filter plate 605, the teeth are evenly spaced about the central axis of the first flame arrester inner core filter plate 605, a plurality of first soft comb teeth 606 are arranged, the first soft comb teeth 606 are evenly spaced about the central axis of the first flame arrester inner core filter plate 605, a plurality of first through holes 607 are opened, and the first through holes 607 are evenly spaced about the central axis of the first flame arrester inner core filter plate 605.

[0037] like Figures 1 to 8As shown, a second flame arrester inner core filter plate 608 is fixed to the outside of the connecting rod 604, a second soft comb teeth 609 is fixed to the outside of the second flame arrester inner core filter plate 608, a second through hole 610 is opened on the outside of the second flame arrester inner core filter plate 608, a plurality of second soft comb teeth 609 are arranged, and the second soft comb teeth 609 are evenly spaced about the central axis of the second flame arrester inner core filter plate 608, a plurality of second through holes 610 are opened, and the second through holes 610 are evenly spaced about the central axis of the second flame arrester inner core filter plate 608.

[0038] like Figures 1 to 8 As shown, the outer part of the connecting rod 604 is sleeved with a third flame arrester inner core filter plate 611, the outer part of the third flame arrester inner core filter plate 611 is fixed with a third soft comb teeth 612, the outer part of the third flame arrester inner core filter plate 611 is provided with a third through hole 613, the outer wall of the third flame arrester inner core filter plate 611 is provided with a plurality of groups of teeth, the teeth are evenly spaced about the central axis of the third flame arrester inner core filter plate 611, the third soft comb teeth 612 are provided with a plurality of groups, the third soft comb teeth 612 are evenly spaced about the central axis of the third flame arrester inner core filter plate 611, the third through holes 613 are provided with a plurality of groups, and the third through holes 613 are evenly spaced about the central axis of the third flame arrester inner core filter plate 611.

[0039] like Figures 1 to 8 As shown, a transmission disk 614 is sleeved on the outside of the connecting rod 604, a fourth through hole 615 is opened on the outside of the transmission disk 614, a transmission blade 616 is fixed on the outside of the transmission disk 614, a plurality of fourth through holes 615 are opened, and the fourth through holes 615 are evenly spaced about the central axis of the transmission disk 614, a plurality of transmission blades 616 are fixed, and the transmission blades 616 are evenly spaced about the central axis of the transmission disk 614, a cleaning rod 617 is fixed on the outside of the transmission disk 614, the transmission disk 614 is rotatably connected to the outside of the connecting rod 604, a plurality of cleaning rods 617 are provided, and the cleaning rods 617 are evenly spaced about the central axis of the transmission disk 614.

[0040] The above scheme is adopted: by starting the servo motor 601 to drive the gear 602 to rotate, so that the gear 602 drives the first flame arrester inner core filter plate 605 and the third flame arrester inner core filter plate 611 through its own shape and is connected through the teeth fixed on the first flame arrester inner core filter plate 605 and the third flame arrester inner core filter plate 611, thereby driving the limit plate 603, the connecting rod 604, the first flame arrester inner core filter plate 605, and the second flame arrester inner core filter plate 608 to rotate, and driving the third flame arrester inner core filter plate 611 to rotate in the opposite direction, so that the impurities filtered inside the flame arrester housing 5 fall off, and when the ammonia passes through the interior of the flame arrester housing 5, the shape of the transmission blade 616 drives the transmission plate 614 to rotate as a whole, and then drives the cleaning rod 617 to rotate, so that the cleaning rod 617 rotates to clean the surface of the second flame arrester inner core filter plate 608.

[0041] The working principle and use process of the present invention are as follows: by starting the servo motor 601 to drive the gear 602 to rotate, the gear 602 drives the first flame arrester inner core filter plate 605 and the third flame arrester inner core filter plate 611 through its own shape, and is connected by the teeth meshing fixed on the first flame arrester inner core filter plate 605 and the third flame arrester inner core filter plate 611, thereby driving the limit plate 603, the connecting rod 604, the first flame arrester inner core filter plate 605, the second flame arrester inner core filter plate 608 to rotate, and driving the third flame arrester inner core filter plate 611 to rotate in the opposite direction, so that the impurities filtered inside the flame arrester housing 5 fall off, and when the ammonia passes through the interior of the flame arrester housing 5, the shape of the transmission blade 616 drives the transmission plate 614 to rotate as a whole, thereby driving the cleaning rod 617 to rotate, so that the cleaning rod 617 rotates to the second flame arrester The surface of the filter plate 608 in the inner core of the device is cleaned, and impurities fall into the sewage pipe 7 and enter the interior of the fixed discharge pit 12 through the third conveying pipe 9. After the impurities are purified by the purification filter element 13 inside the fixed discharge pit 12, the wastewater pump 11 is started. The wastewater pump 11 draws the purified impurities inside the fixed discharge pit 12 to the wastewater pool through the drainage pipe 10 for unified treatment. By introducing high-temperature flue gas from the induced draft pipe 2, the temperature of which is 120-140°C, when the pipeline is blocked, the manual switch 302 is used to open the ammonia spray regulating valve 301, so that the high-temperature flue gas is introduced into the interior of the ammonia spray regulating valve 301 to melt the ice crystals, and by setting the differential pressure detection device 303, the differential pressure detection device 303 can monitor the data and introduce the data into the monitoring panel of the control room, and set the differential pressure alarm so that the monitoring personnel can monitor the pipeline blockage at the first time and deal with it in time.

[0042] 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.

[0043] 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 denitration pipeline anti-blocking device with automatic cleaning function, comprising a first conveying pipeline (1), characterized in that: The top end of the first delivery pipeline (1) is connected to an air induced draft pipeline (2); an opening and closing mechanism (3) is arranged outside the first delivery pipeline (1); a second delivery pipeline (4) is arranged outside the opening and closing mechanism (3); one end of the second delivery pipeline (4) is connected to a flame arrester housing (5); an anti-blocking filtering mechanism (6) is installed inside the flame arrester housing (5); The anti-blocking filtering mechanism (6) comprises a servo motor (601), a gear (602) and a limit plate (603); the servo motor (601) is fixed to the top of the flame arrester housing (5); the gear (602) is fixed to the bottom of the servo motor (601); the flame arrester housing (5) is internally rotatably connected to the limit plate (603); a connecting rod (604) is fixed to one side of the limit plate (603); a first flame arrester inner core filter plate (605) is fixed to the outer wall of the connecting rod (604); a first soft comb tooth (606) is fixed to the outside of the first flame arrester inner core filter plate (605); A first through hole (607) is provided at one end of the filter plate (605); a second flame arrester inner core filter plate (608) is fixed to the outside of the connecting rod (604); a second soft comb teeth (609) are fixed to the outside of the second flame arrester inner core filter plate (608); a second through hole (610) is provided to the outside of the second flame arrester inner core filter plate (608); a third flame arrester inner core filter plate (611) is sleeved on the outside of the connecting rod (604); a third soft comb teeth (612) are fixed to the outside of the third flame arrester inner core filter plate (611); and a third through hole (613) is provided to the outside of the third flame arrester inner core filter plate (611).

2. The flue gas denitration pipeline anti-blocking device with automatic cleaning function according to claim 1 is characterized in that: The connecting rod (604) is sleeved with a transmission disc (614) on its exterior, the transmission disc (614) is provided with a fourth through hole (615) on its exterior, a transmission blade (616) is fixed on the exterior of the transmission disc (614), and a cleaning rod (617) is fixed on the exterior of the transmission disc (614).

3. The flue gas denitration pipeline anti-blocking device with automatic cleaning function according to claim 1 is characterized in that: The outer wall of the gear (602) is provided with a plurality of groups of teeth, and the teeth are distributed at equal intervals about the central axis of the gear (602). The diameter of the limiting plate (603) is equal to the diameter inside the flame arrester housing (5). Two groups of limiting plates (603) are provided, and the limiting plates (603) are distributed symmetrically about the central axis of the connecting rod (604).

4. The flue gas denitration pipeline anti-blocking device with automatic cleaning function according to claim 1 is characterized in that: The outer wall of the first flame arrester inner core filter plate (605) is provided with a plurality of groups of teeth, and the teeth are distributed at equal intervals about the central axis of the first flame arrester inner core filter plate (605); the first soft comb teeth (606) are provided with a plurality of groups, and the first soft comb teeth (606) are distributed at equal intervals about the central axis of the first flame arrester inner core filter plate (605); and the first through holes (607) are provided with a plurality of groups, and the first through holes (607) are distributed at equal intervals about the central axis of the first flame arrester inner core filter plate (605).

5. The flue gas denitration pipeline anti-blocking device with automatic cleaning function according to claim 1 is characterized in that: The second soft comb teeth (609) are provided in a plurality of groups, and the second soft comb teeth (609) are distributed at equal intervals about the central axis of the second flame arrester inner core filter plate (608); the second through holes (610) are provided in a plurality of groups, and the second through holes (610) are distributed at equal intervals about the central axis of the second flame arrester inner core filter plate (608).

6. The flue gas denitration pipeline anti-blocking device with automatic cleaning function according to claim 1 is characterized in that: The outer wall of the third flame arrester inner core filter plate (611) is provided with a plurality of groups of teeth, and the teeth are distributed at equal intervals about the central axis of the third flame arrester inner core filter plate (611); the third soft comb teeth (612) are provided with a plurality of groups, and the third soft comb teeth (612) are distributed at equal intervals about the central axis of the third flame arrester inner core filter plate (611); the third through holes (613) are provided with a plurality of groups, and the third through holes (613) are distributed at equal intervals about the central axis of the third flame arrester inner core filter plate (611).

7. The flue gas denitration pipeline anti-blocking device with automatic cleaning function according to claim 2 is characterized in that: The fourth through holes (615) are provided in a plurality of groups, and the fourth through holes (615) are distributed at equal intervals about the central axis of the transmission disk (614). The transmission blades (616) are fixed in a plurality of groups, and the transmission blades (616) are distributed at equal intervals about the central axis of the transmission disk (614).

8. The flue gas denitration pipeline anti-blocking device with automatic cleaning function according to claim 2 is characterized in that: The transmission disc (614) is rotatably connected to the outside of the connecting rod (604), and a plurality of groups of cleaning rods (617) are provided. The cleaning rods (617) are distributed at equal intervals about the central axis of the transmission disc (614).

9. The flue gas denitration pipeline anti-blocking device with automatic cleaning function according to claim 1 is characterized in that: The opening and closing mechanism (3) comprises an ammonia injection regulating valve (301), a manual switch (302) and a differential pressure detection device (303); the ammonia injection regulating valve (301) is connected to one end of the first delivery pipeline (1); the manual switch (302) is installed at the top end of the ammonia injection regulating valve (301); the differential pressure detection device (303) is arranged at the bottom end of the ammonia injection regulating valve (301); and the output end of the ammonia injection regulating valve (301) is connected to the second delivery pipeline (4).

10. The flue gas denitrification pipeline anti-blocking device with automatic cleaning function according to claim 1, characterized in that: The bottom end of the flame arrester housing (5) is connected to a sewage pipe (7), one end of which is connected to a water supply main pipe (8), the bottom end of the sewage pipe (7) is connected to a third delivery pipe (9), the bottom end of the third delivery pipe (9) is connected to a fixed drainage pit (12), a plurality of groups of purification filter elements (13) are arranged in an equidistant manner inside the fixed drainage pit (12), the inside of the fixed drainage pit (12) is connected to a drainage pipe (10), and a wastewater pump (11) is installed at the top of the drainage pipe (10).

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