Industrial flue gas dedusting and denitration integrated filter device

Abstract

The application discloses an industrial flue gas dust removal and denitration integrated filtering device, and belongs to the technical field of flue gas treatment devices.The device comprises, from bottom to top, a dust collecting hopper, a dust removal bin and a denitration bin, wherein the dust removal bin is internally provided with a flower plate, a plurality of groups of through holes are formed in the flower plate, a dust removal assembly is arranged at the position corresponding to the through holes at the bottom of the flower plate, the dust removal assembly comprises a bag cage and fixing rings fixed to the two ends of the bag cage, a filtering unit is sleeved outside the bag cage, and the fixing ring at the top end of the bag cage is detachably connected with the flower plate through a clamping piece.The application realizes the automatic unlocking of the dust removal assembly corresponding to the low-position floating ring and the flower plate by means of the height difference of the adjacent floating rings, and compared with the electrical detection means such as sensors, the structure is not affected by the overall flow fluctuation of the flue gas, can accurately and reliably identify the dust removal assembly that needs to be manually cleaned, and greatly improves the checking accuracy and efficiency of the dust removal assembly.

Description

Technical Field

[0001] This invention relates to the field of flue gas treatment equipment technology, and in particular to an integrated industrial flue gas dust removal and denitrification filtration device. Background Technology

[0002] Industrial flue gas contains a large amount of pollutants such as dust and nitrogen oxides. Direct emission of such gas would cause serious air pollution. Therefore, flue gas must undergo purification treatment such as dust removal and denitrification before emission.

[0003] In existing technologies, multiple sets of bag filter dust collectors are typically arranged in an array within the dust collection chamber. The filtered clean flue gas flows upward and mixes with ammonia gas, then undergoes a selective reduction reaction via a catalyst in the denitrification chamber. However, in actual industrial applications, due to factors such as flue gas flow fluctuations and differences in dust viscosity, the multiple sets of dust collectors arranged in an array are prone to inconsistent filtration states. Some filter bags may experience a rapid decline in filtration efficiency due to dust caking, pore blockage by ultrafine dust, and adhesion of sticky pollutants. Even pulse purging and other cleaning methods are insufficient for effective cleaning, requiring manual removal and subsequent water washing or deep cleaning by personnel.

[0004] Currently, for the aforementioned clogged dust collector components, existing technologies can monitor the filtration resistance or flow rate of a single dust collector component by installing differential pressure sensors, flow sensors, or other detection elements within the device, thereby determining the clogging status of the filter bags; or rely on personnel to periodically inspect the usage status of the dust collector components. However, the former is affected by the harsh operating conditions of high temperature and high dust in industrial flue gas, making sensors prone to failure and decreased detection accuracy, and is also affected by fluctuations in the overall flue gas flow rate, making it difficult to accurately identify a single clogged dust collector component; the latter, due to the large number of dust collector components, results in lower inspection efficiency.

[0005] Therefore, it is necessary to provide an integrated industrial flue gas dust removal and denitrification filtration device to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide an integrated industrial flue gas dust removal and denitrification filtration device to solve the technical problems mentioned in the background art.

[0007] Based on the above ideas, the present invention provides the following technical solution: an integrated dust removal and denitrification filtration device for industrial flue gas, including a dust removal chamber and a denitrification chamber. The dust removal chamber is provided with a tube sheet, and the tube sheet has multiple sets of through holes. A dust removal component is provided at each of the through holes. The dust removal component includes a bag cage and fixing rings fixed at both ends of the bag cage. A filter unit is sleeved on the outside of the bag cage. The fixing ring at the top of the bag cage is detachably connected to the tube sheet through a snap fastener. The top of the bag cage is slidably fitted with a floating ring, and the floating ring is provided with a drive component adapted to the snap-fit ​​component. The output end of the drive component is a swing rod, and the snap-fit ​​component is provided with a slot for the bottom end of the swing rod to pass through. The input end of the drive component is a top block, and the top block is elastically connected to the floating ring along the diameter direction of the floating ring. The top blocks on two adjacent floating rings abut against each other. When the rising distance of one floating ring is less than that of its adjacent floating ring, the two top blocks that are in contact with each other are misaligned and move relative to each other, thereby triggering the drive component on the lower floating ring to drive the swing arm to swing, thereby unlocking and separating the fixed ring at the top of the cage from the flower plate.

[0008] As a further aspect of the present invention: a slot is provided on the inner wall of the through hole to cooperate with the snap-fit ​​component.

[0009] As a further aspect of the present invention: a scroll is rotatably connected to the top of the top block, a gear is fixedly sleeved on the scroll, and a rack is fixedly embedded at the bottom of the top block; when the two top blocks are misaligned and move relative to each other, the rack on the upper top block can mesh with the gear on the lower top block.

[0010] As a further aspect of the present invention: a traction member is connected between the scroll and the swing rod. The swing rod is hinged to the floating ring through its own hinge axis, and the swing rod is elastically engaged with the floating ring along the circumferential direction of the hinge axis. During the process of the traction member pulling the swing rod to make it swing, the swing rod can push the locking member to separate the locking member from the locking groove.

[0011] As a further embodiment of the present invention: a limiting block is fixedly installed on the top of the top block, and a limiting groove is formed at the bottom of the top block, with the limiting groove and the limiting block on the same top block in the same vertical plane.

[0012] As a further aspect of the present invention, both the limiting block and the limiting groove have T-shaped cross-sections.

[0013] As a further aspect of the present invention, the device also includes an air inlet, and a flow guiding unit is provided at the position of the air inlet. The flue gas entering the device flows upward after passing through the flow guiding unit and enters the filter unit.

[0014] As a further aspect of the present invention: the floating ring has an installation groove along its own axis, and the swing rod is disposed in the installation groove.

[0015] As a further aspect of the present invention: the bushing sleeve fitted on the outer side of the hinge shaft is fixed to the inner wall of the mounting groove, and a torsion spring is fitted on the outer side of the hinge shaft, with the two ends of the torsion spring connected to the bushing sleeve and the hinge shaft respectively.

[0016] As a further aspect of the present invention, the bottom side edge of the through hole is chamfered.

[0017] Compared with existing technologies, the beneficial effects of this invention are as follows: When the two top blocks move relative to each other under elastic force, the rack and gear mesh and drive the roller to rotate, which in turn pulls the traction component to drive the swing arm to swing. The swing arm pushes the locking component to separate from the slot, ultimately unlocking the fixed ring of the blocked dust removal component from the tube sheet and causing it to move downward. This solution utilizes the difference in the rising height of adjacent floating rings to achieve automatic unlocking of the lower floating ring corresponding to the dust removal component and the tube sheet. Compared with electrical detection methods such as sensors, this structure is not affected by fluctuations in the overall flue gas flow rate and can accurately and reliably identify dust removal components that need manual cleaning, significantly improving the accuracy and efficiency of dust removal component inspection. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a distribution diagram of the floating rings of the present invention on the perforated plate; Figure 3 This is a schematic diagram of the filter unit structure of the present invention; Figure 4 This is the present invention. Figure 3 A magnified structural diagram at point A; Figure 5 This is a schematic diagram of the bag cage structure of the present invention; Figure 6 This is a schematic diagram of the drive component structure of the present invention; Figure 7 This is the present invention. Figure 6 A magnified structural diagram at point B; Figure 8 This is a schematic diagram of the two mutually fitting top blocks being staggered according to the present invention; Figure 9 This is the present invention. Figure 8 A magnified structural diagram at point C; Figure 10 This is a distribution diagram of the top block on the outer circumferential surface of the floating ring according to the present invention; Figure 11 This is a schematic diagram of the floating ring mounting structure of the present invention; Figure 12 This is a schematic diagram of the position of the stop lever of the present invention.

[0020] In the diagram: 1. Dust collection bin; 2. Ash collection hopper; 3. Denitrification bin; 4. Tube sheet; 401. Through hole; 4011. Chamfer; 4012. Slot; 5. Floating ring; 501. Connecting plate; 6. Top block; 601. Limiting slot; 7. Filter unit; 8. Longitudinal positioning ring; 9. Connecting block; 10. Traction component; 11. Swing rod; 1101. Hinge shaft; 12. Snap-fit ​​component; 1201. Slot; 1202. Protrusion; 13. Bag cage; 1301. Fixing ring; 14. Guide rod; 15. Gear; 16. Limiting block; 17. Reel; 18. Air inlet; 19. Flow guiding unit; 20. Rack; 21. Guide column; 22. Stop bar. Detailed Implementation

[0021] like Figures 1-12 As shown, an integrated industrial flue gas dust removal and denitrification filtration device comprises, from bottom to top, a dust collection hopper 2, a dust removal chamber 1, and a denitrification chamber 3. Multiple sets of dust removal components are arrayed within the dust removal chamber 1 to effectively filter the flue gas entering the device through the air inlet 18. Multiple sets of nozzles for ammonia injection and a catalyst for the catalytic reaction are arranged within the denitrification chamber 3; the catalyst uses a dedicated SCR catalyst substrate. The nozzles for ammonia injection are evenly distributed along the cross-section of the denitrification chamber 3, atomizing and uniformly spraying ammonia gas, allowing it to quickly mix with the upward-flowing clean flue gas, forming a uniform ammonia-flue gas mixture. The mixed ammonia-flue gas continuously flows upward through the surface and internal pores of the catalyst. Through the catalytic action of the catalyst, nitrogen oxides in the flue gas undergo a selective reduction reaction with ammonia, specifically generating pollution-free nitrogen and water, thereby efficiently removing nitrogen oxides from the flue gas and meeting industrial flue gas purification standards. The SCR denitrification process and structure are existing technologies and will not be elaborated upon here. This invention focuses on a detailed description of a dust removal assembly used for filtering flue gas, as follows: Reference Figures 2-10 As shown, a tube sheet 4 is fixedly connected inside the dust removal chamber 1. Multiple sets of through holes 401 are opened on the tube sheet 4, and the multiple sets of through holes 401 are arranged one-to-one with the multiple sets of dust removal components.

[0022] The dust removal assembly includes a bag cage 13 and fixing rings 1301 fixedly installed at both ends of the bag cage 13. A filter unit 7 is sleeved on the outside of the bag cage 13. The filter unit 7 can be, for example, a filter bag or a metal filter felt. The bag cage 13 is correspondingly arranged with the through hole 401 and is detachably connected to the lower part of the tube sheet 4. It should be noted that the bottom of the fixing ring 1301 located at the bottom of the bag cage 13 is sealed, so that the flue gas entering the dust collection chamber 1 can only enter the bag cage 13 from the outside of the filter unit 7 and finally flow out from the top of the bag cage 13.

[0023] In actual use, when the filter unit 7 is clogged and difficult to clean, it needs to be removed for cleaning. To facilitate the identification of dust removal components that require manual cleaning, this solution provides a floating ring 5 at the top of the bag cage 13. Specifically, the floating ring 5 is slidably disposed inside the fixed ring 1301.

[0024] The fixing ring 1301 at the top of the bag cage 13 is engaged with the tube sheet 4 via a rod-shaped snap-fit ​​member 12, facilitating quick removal or installation of the bag cage 13. Specifically, the fixing ring 1301 at the top of the bag cage 13 can be inserted into the through hole 401 during installation, and the inner wall of the through hole 401 has a slot 4012 that mates with the snap-fit ​​member 12. Figure 4 As shown, the bottom side edge of the through hole 401 is set as a chamfer 4011. During the process of inserting the fixing ring 1301 at the top of the bag cage 13 into the through hole 401, the snap-fit ​​12 contacts the chamfer 4011 and is squeezed into the fixing ring 1301. When the snap-fit ​​12 is aligned with the slot 4012, the snap-fit ​​12 pops out and inserts into the slot 4012, so that the bag cage 13 is snapped into the flower plate 4.

[0025] Combination Figure 8 , Figure 11 As shown, a longitudinal positioning ring 8 is fixedly installed at the top of the through hole 401. When the fixing ring 1301 at the top of the bag cage 13 is inserted upward into the through hole 401 and abuts against the longitudinal positioning ring 8, the snap fastener 12 is aligned with the snap groove 4012.

[0026] Furthermore, the floating ring 5 is provided with a driving component that cooperates with the snap-fit ​​component 12. The driving component is configured to lock the fixed ring 1301 into the through hole 401 through the snap-fit ​​component 12 or to unlock the fixed ring 1301 from the through hole 401.

[0027] Combination Figures 3-6 As shown, the output end of the drive assembly is a rocker arm 11, and the snap-fit ​​member 12 is provided with a slot 1201 for the bottom end of the rocker arm 11 to pass through. The slot 1201 is elongated. The input end of the drive assembly is a top block 6, and the top block 6 is elastically connected to the floating ring 5 along the diameter direction of the floating ring 5. (Refer to...) Figures 3-4 As shown, the top blocks 6 between two adjacent sets of floating rings 5 ​​are pressed and squeezed together. When a floating ring 5 has a shorter rising distance than its neighboring floating ring 5, the two pressing top blocks 6 can be staggered vertically and move relative to each other. See the attached diagram for details. Figure 8 As shown.

[0028] When the two top blocks 6 move relative to each other, the driving component of the lower floating ring 5 will drive the swing arm 11 to swing, pushing the locking piece 12 to disengage from the locking slot 4012, thereby unlocking and separating the bag cage 13 corresponding to the lower floating ring 5 from the tube sheet 4. On the one hand, this allows for the rapid disassembly of the dust removal components, facilitating offline cleaning by staff; on the other hand, the unlocked dust removal components will move downwards vertically a certain distance, forming a clear location marker, which can help staff quickly identify and locate the dust removal components that need manual cleaning, greatly improving the efficiency of troubleshooting and maintenance.

[0029] As a specific structure of the drive component, the top of the top block 6 is recessed inward to form a recessed portion, and a scroll 17 is rotatably connected within this recessed portion. A gear 15 is fixedly sleeved on the scroll 17, and a rack 20 is fixedly embedded in the bottom of the top block 6. When the two top blocks 6 are in a vertically misaligned state and move relative to each other, the rack 20 of the upper top block 6 will mesh with the gear 15 of the lower top block 6, thereby driving the scroll 17 to rotate synchronously.

[0030] A traction member 10 is fixed between the spool 17 and the top end of the swing rod 11. The traction member 10 can be, for example, a fiberglass rope, a fiberglass braided rope, or a steel wire. The swing rod 11 is hinged to the floating ring 5 via its own hinge shaft 1101, and the swing rod 11 is elastically engaged with the floating ring 5 along the circumferential direction of the hinge shaft 1101. When the spool 17 is rotated by the meshing of the gear 15 and the rack 20, the spool 17 can wind around the traction member 10 and pull the top end of the swing rod 11, causing the swing rod 11 to rotate around the hinge shaft 1101. During this process, the bottom end of the swing rod 11 will push the locking member 12 to move away from the slot 4012, so that the locking member 12 is separated from the slot 4012, and the fixing ring 1301 will unlock from the tube sheet 4. As a result, the dust removal component moves downward in the vertical direction, allowing the staff to promptly detect the dust removal component to be cleaned.

[0031] In summary, when the device filters industrial flue gas, dust will gradually accumulate on the surface of the filter unit 7. When this dust is difficult to remove effectively by conventional cleaning methods such as pulse blowing, the operator can disassemble the corresponding dust removal component to perform offline deep cleaning of the filter unit 7. Specifically, if the filter unit 7 is severely clogged, the amount of flue gas entering the filter unit 7 will be greatly reduced, and the distance that the floating ring 5 at the top of the bag cage 13 is pushed up by the flue gas will also be shortened. At this time, the top blocks 6 that are attached to each other on the two adjacent floating rings 5 ​​will be misaligned, and the top block 6 corresponding to the clogged dust removal component will be in the lower position. When the two top blocks 6 move relative to each other under the elastic force, the rack 20 and the gear 15 mesh and drive the roller 17 to rotate, which in turn pulls the traction component 10 to drive the swing arm 11 to swing. The swing arm 11 pushes the locking component 12 to separate from the slot 4012, and finally unlocks the fixed ring 1301 of the clogged dust removal component from the tube sheet 4 and moves downward. This solution utilizes the height difference between adjacent floating rings 5 ​​to automatically unlock the dust removal components and tube sheet 4 corresponding to the lower floating ring 5. Compared to electrical detection methods such as sensors, this structure is not affected by fluctuations in the overall flue gas flow rate and can accurately and reliably identify dust removal components that need manual cleaning, greatly improving the accuracy and efficiency of dust removal component inspection.

[0032] like Figure 2 , Figure 10 As shown, the top block 6 and the traction component 10 can be arranged in multiple groups, for example, two or four groups, all arranged in a ring array outside the floating ring 5. Combined with... Figures 6-7 As shown, except for the traction member 10 directly connected to the swing arm 11 and positioned opposite it, the ends of the other traction members 10, away from the reel 17, extend to the swing arm 11 and pass around the outside of the pulley before connecting to the swing arm 11. This allows any traction member 10 to pull the swing arm 11 to swing. This structure ensures that when a floating ring 5 is lower than its adjacent floating ring 5, the cage frame at the lower floating ring 5 can be unlocked from the flower plate 4, facilitating replacement.

[0033] like Figures 4-6 As shown, the bottom of the floating ring 5 has an installation groove along its own axis. Alternatively, the installation groove can penetrate the floating ring 5, but the top of the groove must be sealed with an end cap. The aforementioned swing rod 11 and pulley are both installed within the installation groove. Specifically, a bushing fitted on the outer side of the hinge shaft 1101 is fixed to the inner wall of the installation groove, and a torsion spring is fitted on the outer side of the hinge shaft 1101. The two ends of the torsion spring are connected to the bushing and the hinge shaft 1101 respectively, allowing the swing rod 11 to remain vertical in its initial state. With this structure, during the installation of the bag cage 13, the fixing ring 1301 at the top of the bag cage 13 is inserted upwards into the through hole 401, allowing the snap-fit ​​member 12 to enter the installation groove, and the swing rod 11 to be inserted into the slot 1201, thus facilitating the installation of the bag cage 13.

[0034] The snap-fit ​​member 12 is disposed through the fixing ring 1301 and both sides of the snap-fit ​​member 12 protrude outward to form protrusions 1202. A spring is fixed between the protrusions 1202 and the inner wall of the fixing ring 1301, so that the snap-fit ​​member 12 and the fixing ring 1301 are elastically engaged.

[0035] A connecting block 9 is provided at one end of the top block 6 near the fixed ring 1301. The connecting block 9 is fixedly installed on the outer circumferential surface of the floating ring 5, and the guide rod 14, which is fixedly connected to the top block 6, extends into the connecting block 9 and slides in cooperation with the connecting block 9. It should be noted that the guide rod 14 is arranged along the diameter direction of the floating ring 5, and a limiting spring is sleeved on the outer side of the guide rod 14. The limiting spring is connected between the top block 6 and the connecting block 9. When the two top blocks 6 that are in contact with each other are misaligned, the top blocks 6 can move away from the floating ring 5 under the elastic force, so that the two top blocks 6 that were originally in contact can move relative to each other.

[0036] The aforementioned traction member 10 can pass through the connecting block 9 and the floating ring 5 and can slide relative to both.

[0037] Furthermore, a limiting block 16 is fixed to the top of the top block 6, and a limiting groove 601 is formed at the bottom of the top block 6; the limiting block 16 and the limiting groove 601 on the same top block 6 are on the same vertical plane, and their projections on the connecting block 9 are both T-shaped structures. With this structure, when the two top blocks 6 that are in contact with each other become misaligned, the limiting block 16 of the lower top block 6 will align with the limiting groove 601 of the upper top block 6, and the limiting block 16 can be inserted into the limiting groove 601 (see details). Figures 8-9 This allows the two top blocks 6 to form a stable engagement relationship in the horizontal direction, thereby ensuring that the rack 20 and gear 15, which are respectively set on the two top blocks 6, achieve precise and stable meshing.

[0038] like Figure 5 As shown, a flow guiding unit 19 is provided at the air inlet 18 in the device. The flow guiding unit 19 can be, for example, a flow equalization plate or a flow guide plate, so that the flue gas entering the device can flow upward evenly and avoid the flue gas from concentrating at a few dust removal components.

[0039] like Figure 11As shown, a connecting plate 501 is fixedly installed on the outer wall of the floating ring 5, and a guide post 21 fixed to the top of the tube sheet 4 passes through the connecting plate 501 and slides in cooperation with the connecting plate 501. A retaining ring is fixedly installed at the top of the guide post 21. Elastic elements are provided between the retaining ring and the connecting plate 501, and between the connecting plate 501 and the tube sheet 4. The elastic elements can be, for example, springs, so that the floating ring 5 is elastically connected to the tube sheet 4 along the axial direction of the bag cage 13. During the process of flue gas being discharged through the floating ring 5, the pressure of the flue gas on the floating ring 5 can cause the floating ring 5 to overcome the elastic force and move upward.

[0040] In actual use, nozzles can be installed above the floating ring 5. These nozzles are connected to an external high-pressure gas storage tank via pipelines, enabling the injection of high-pressure gas into the dust removal components to achieve pulse cleaning. This pulse jet cleaning is a conventional dust removal method in the field of dust removal, and its specific working principle will not be elaborated here.

[0041] like Figure 12 As shown, a vertical plate is fixedly installed at the bottom of the tube sheet 4, and a stop bar 22 is fitted at the vertical rod. The stop bar 22 is located below the fixing ring 1301 at the top of the bag cage 13, and the stop bar 22 is threadedly connected or slidably connected to the vertical plate. When the bag cage 13 is unlocked from the tube sheet 4, the fixing ring 1301 at the top of the bag cage 13 can fall onto the stop bar 22, thereby preventing the dust collection component from falling into the dust collection hopper 2.

[0042] The above-disclosed examples are merely preferred embodiments of this application, intended to facilitate understanding and implementation by those skilled in the art. However, they cannot be used to limit the scope of this application. Therefore, equivalent variations made within the scope of this application are still within the scope of this application.

Claims

1. An integrated dust removal and denitrification filtration device for industrial flue gas, comprising a dust removal chamber (1) and a denitrification chamber (3), wherein a tube sheet (4) is provided inside the dust removal chamber (1), and multiple sets of through holes (401) are provided on the tube sheet (4), and dust removal components are provided at the through holes (401), characterized in that: The dust removal assembly includes a bag cage (13) and fixing rings (1301) fixed at both ends of the bag cage (13). A filter unit (7) is sleeved on the outside of the bag cage (13). The fixing ring (1301) at the top of the bag cage (13) is detachably connected to the tube sheet (4) through a snap fastener (12). The top of the bag cage (13) is slidably fitted with a floating ring (5). The floating ring (5) is provided with a drive assembly that is compatible with the snap-fit ​​part (12). The output end of the drive assembly is a swing rod (11). The snap-fit ​​part (12) is provided with a slot (1201) for the bottom end of the swing rod (11) to pass through. The input end of the drive assembly is a top block (6). The top block (6) is elastically connected to the floating ring (5) along the diameter direction of the floating ring (5). The top blocks (6) on two adjacent floating rings (5) abut against each other. When the rising distance of one floating ring (5) is less than that of its adjacent floating ring (5), the two top blocks (6) that are in contact with each other are misaligned and move relative to each other, thereby triggering the drive component on the lower floating ring (5) to drive the swing arm (11) to swing, thereby unlocking and separating the fixed ring (1301) at the top of the cage (13) from the flower plate (4). The inner wall of the through hole (401) is provided with a slot (4012) that cooperates with the snap-fit ​​member (12). The top of the top block (6) is rotatably connected to a scroll (17), and a gear (15) is fixedly sleeved on the scroll (17). A rack (20) is fixedly embedded at the bottom of the top block (6). When the two top blocks (6) are misaligned and move relative to each other, the rack (20) on the upper top block (6) can mesh with the gear (15) on the lower top block (6). A traction member (10) is connected between the scroll (17) and the swing rod (11). The swing rod (11) is hinged to the floating ring (5) through its own hinge shaft (1101), and the swing rod (11) is elastically engaged with the floating ring (5) along the circumferential direction of the hinge shaft (1101). During the process of the traction member (10) pulling the swing rod (11) to make it swing, the swing rod (11) can push the snap fastener (12) to separate the snap fastener (12) from the slot (4012).

2. The integrated industrial flue gas dust removal and denitrification filtration device according to claim 1, characterized in that: A limiting block (16) is fixedly installed on the top of the top block (6), and a limiting groove (601) is opened at the bottom of the top block (6). The limiting groove (601) on the same top block (6) and the limiting block (16) are in the same vertical plane.

3. The integrated industrial flue gas dust removal and denitrification filtration device according to claim 2, characterized in that: The cross-sections of the limiting block (16) and the limiting groove (601) are both T-shaped structures.

4. The integrated industrial flue gas dust removal and denitrification filtration device according to claim 1, characterized in that: The device also includes an air inlet (18), and a flow guiding unit (19) is provided at the position of the air inlet (18) in the device. After the flue gas enters the device, it flows upward through the flow guiding unit (19) and enters the filter unit (7).

5. The integrated industrial flue gas dust removal and denitrification filtration device according to claim 1, characterized in that: The floating ring (5) has an installation groove along its own axis, and the swing rod (11) is set in the installation groove.

6. The integrated industrial flue gas dust removal and denitrification filtration device according to claim 5, characterized in that: The bushing sleeve fitted on the outside of the hinge shaft (1101) is fixed to the inner wall of the mounting groove, and a torsion spring is fitted on the outside of the hinge shaft (1101), with the two ends of the torsion spring connected to the bushing sleeve and the hinge shaft (1101) respectively.

7. The integrated industrial flue gas dust removal and denitrification filtration device according to claim 1, characterized in that: The bottom side edge of the through hole (401) is chamfered (4011).

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